OK, so here it is...everything I have. And can someone please tell me why there are two of the exact same card number but they're different cards?

I would really like to know. Just look for the (?) next to them. There's only a couple.
No Letters:
G – 1/48 Fire Pit
G – 1/48 Fire Pit
G – 2/48 Muddy Ground
G – 2/48 Muddy Ground
G – 4/48 Tsunami
G – 11/48 Mantris
G – 13/48 Cycloid
G – 14/48 Hynoid
G – 15/48 Teamwork
G – 16/48 Tuskor
G – 18/48 Lockdown
G – 18/48 Lockdown
G – 19/48 G-Power Exchange
G – 20/48 Stand Off
G – 21/48 Bakugan Swap
G – 21/48 Bakugan Swap
A – 25/48 Marucho’s Throw
A – 25/48 Marucho’s Throw
A - 28/28 Shun’s Throw
A - 28/28 Shun’s Throw
A – 29/48 Masquerade’s Throw (Hologram)
A – 32/48 Rikimaro’s Surprise
A – 34/48 G-Power Boost
A – 35/48 G-Power Bump
A – 37/48 Home Advantage
A – 41/48 Pyrus
A - 42/48 Siege Switch
A – 43/48 Help From Friends
A – 43/48 Help From Friends
A – 43/48 Help From Friends
A – 46/48 Doom Card
A – 48/48 Haos
A – 48/48 Haos
A Series:G – 2/15 Card Force
G – 6/15 Quick Sand
A – 7/15 Try Again
A – 7/15 Try Again
A – 12/15 Copy Cat
A – 13/15 Attractor
A – 14/15 Do Over
A – 15/15 Re-Roll
B Series:G - 1/48 Earthen Mound
G - 1/48 Earthen Mound
G - 1/48 Earthen Mound
G - 2/48 Elevated Field
G – 3/48 Force Wind
G – 4/48 Low Energy
G - 7/48 Sunrise
G – 9/48 Limulus
G - 10/48 Ravenoid
G - 11/48 Warius
G – 12/48 Wormquake
G - 13/48 Forest Fire
G – 15/48 Lightning Storm
G – 16/48 Skyress
G – 17/48 Drag
G - 17/48 Drag
G – 19/48 Rainbow
G – 20/48 Tricky Gate
G – 21/48 Earth, Wind & Fire
G – 22/48 G-Power Exchange
G – 24/48 River Styx
A – 25/48 Magnetic Action
A – 25/48 Magnetic Action
A – 26/48 Meeting Place
A – 27/48 Perfect Rain
A – 28/48 Unexpected Guest
A – 30/48 A Hand Up
A – 31/48 Marionette
A – 33/48 Flash
A – 34/48 G-Power Bonus
A – 34/48 G-Power Bonus
A – 35/48 G-Power Up
A – 37/48 Circle of Fire
A – 38/48 Special Boost
A – 38/48 Special Boost (Foil)
A – 39/48 Special Crush
A – 40/48 Updraft
A – 40/48 Updraft (sparkly)
A – 41/48 Aquos 2
A – 42/48 Haos 2
A – 43/48 Preyas Switch
A – 44/48 Tigrerra
A – 47/48 Sub Terra 2
A – 48/48 Ventus 2 (Hologram)
C Series:G – 1/48 Aquos Vortex
G – 2/48 Power Keg
G – 3/48 Heavy Surf
G – 3/48 Heavy Surf
G – 4/48 The Cliffs
G – 6/48 Pit Dweller
G – 7/48 Nightmare
G – 7/48 Nightmare
G – 8/48 The Spires
G – 10/48 Harpus
G – 11/48 Fourtress
G – 12/48 Sirenoid
G – 13/48 Rattleoid
G – 13/48 Rattleoid
G – 14/48 Lone Wolf
G – 15/48 Ethereas
G – 16/48 El Condor
G – 18/48 Lock & Load
G – 19/48 Lift
G – 21/48 Drain Power
G – 22/48 Special Help
G – 23/48 High Voltage
G – 24/48 Sting
G – 24/48 Sting
A – 25/48 Runo’s Launcher
A – 26/48 Masquerade’s Launcher
A – 28/48 Julie’s Launcher
A – 30/48 Combo Battle
A – 30/48 Combo Battle
A – 31/48 Shun’s Launcher
A – 32/48 Dan’s Launcher (Sparkly)
A – 34/48 Lightwind Color Shift
A – 36/48 G-Power Increase
A – 36/48 G-Power Increase
A – 37/48 Triangle of Power
A – 37/48 Triangle of Power
A – 37/48 Triangle of Power (Foil)
A – 39/48 Special Bump
A – 40/48 Special Boost
A – 41/48 Touch with Fire
A – 41/48 Touch with Fire
A – 41/48 Touch with Fire
A – 42/48 Flowing Waters
A – 42/48 Flowing Waters
A – 42/48 Flowing Waters
A – 43/48 See the Light
A – 43/48 See the Light
A – 44/48 Darkness to Victory
A – 47/48 Bee Striker
D Series:G – 1/48 Spitting Fire
G – 2/48 Earthen Wave
G – 4/48 Black Hole
G – 5/48 Wind Farm
G – 6/48 Whirlpool
G – 7/48 Fields of Lava
G – 8/48 Blue Sky
G – 9/48 Wavern
G – 11/48 Apollonir
G – 12/48 Clayf
G – 13/48 Oberus
G – 15/48 Swift Blow
G – 17/48 Magma Fields
G – 18/48 Charging Ground
G – 18/48 Charging Ground
G – 19/48 Blurred Heat
G – 21/48 Naga
G – 22/48 Chum
G – 23/48 Mana Surge
G – 24/48 Grand Exchange
A – 25/48 Minefield
A – 27/48 Distraction
A – 28/48 Go for Perfect
A – 30/48 Mirage
A – 31/48 Restock
A – 32/48 Learn from Experience
A – 33/48 The Glow
A – 34/48 The Shadow
A – 34/48 The Shadow
A – 34/48 Bronze Launcher (?)
A – 35/48 The Gust
A – 35/48 Golden Launcher (?)
A – 36/48 Big Brawl
A – 40/48 Get it Right Next Time
A – 41/48 Earth Shutdown
A – 41/48 Earth Shutdown
A – 42/48 Fire Shutdown
A – 44/48 Wind Shutdown
A – 46/48 Light Shutdown
A – 47/48 Color Swap
A – 47/48 Color Swap
A – 48/48 The Right Tool for the Job
A – 48/48 The Right Tool for the Job
E Series:G – 1/48 Gate of Fire
G – 1/48 Gate of Fire (Stamped)
G – 2/48 Gate of Wind
G – 2/48 Gate of Wind
G – 2/48 Gate of Wind (Stamped)
G – 3/48 Gate of Doom
G – 4/48 Triangle Gate
G – 4/48 Triangle Gate (Stamped)
G – 4/48 Triangle Gate (Stamped)
G – 4/48 Triangle Gate (Stamped)
G – 4/48 Triangle Gate (Stamped)
G – 5/48 Gate of Light
G – 6/48 Gate of Earth
G – 7/48 River Gate
G - 7/48 River Gate
G – 7/48 River Gate
G – 8/48 Three Gate
G – 8/48 Three Gate (Stamped)
G – 9/48 Nemus (Stamped)
G – 10/48 Dragonoid
G – 11/48 Percival
G – 12/48 Ingram
G – 13/48 Holding Power
G – 14/48 Brontes
G – 14/48 Brontes
G – 14/48 Brontes (Stamped)
G – 16/48 Glamour Gate
G – 17/48 Low Bridge
G – 17/48 Low Bridge
G – 17/48 Low Bridge (Stamped)
G – 18/48 Windy Beach
G – 18/48 Windy Beach
G – 18/48 Windy Beach (Stamped)
G – 18/48 Windy Beach (Stamped)
G – 19/48 Open Field
G – 19/48 Open Field (Stamped)
G – 20/48 Rainbow
G – 20/48 Rainbow (Stamped)
G – 21/48 Field of Flames
G – 22/48 Field of Dread
G – 23/48 Resupply
G – 23/48 Resupply
G – 24/48 Cursed Mirror
A – 25/48 Rip Tide
A – 26/48 Hard Rain
A – 27/48 Lightning
A – 28/48 Stormy Night
A – 29/48 Call of the Hex
A – 30/48 Call of the Defenders
A – 31/48 Deadly Lync Volan #6
A – 31/48 Deadly Lync Volan #6
A – 32/48 Gus’s Powerblast
A – 33/48 Turn Around
A – 33/48 Turn Around
A – 34/48 Bright Eyes
A – 35/48 Powder Keg
A – 35/48 Powder Keg
A – 36/48 Sparks
A – 36/48 Sparks
A – 37/48 Heavy Water
A – 38/48 Dark Hole
A – 40/48 Burning Sands
A – 40/48 Burning Sands
A – 41/48 Solar Winds
A – 41/48 Solar Winds
A – 41/48 Solar Winds (Ruined)
A – 42/48 Bright Earth
A – 42/48 Bright Earth
A – 45/48 Dire Reaper
A – 46/48 Hercules
A – 47/48 Shiny Devil
A – 47/48 Shiny Devil
F Series:A – 1/8 Poison Sting
A – 1/8 Poison Sting
A – 2/8 Death from Above
A – 2/8 Death from Above
A – 3/8 Reverse Polarity
A – 3/8 Reverse Polarity
A – 4/8 Crush Under Foot
A – 4/8 Crush Under Foot
A – 5/8 Random Power
A – 5/8 Random Power
A – 5/8 Random Power
A – 5/8 Random Power
A – 5/8 Random Power
A – 6/8 Serpent Snare
A – 6/8 Serpent Snare
A – 6/8 Serpent Snare
A – 7/8 Prismatic Magnifier
A – 7/8 Prismatic Magnifier
A – 8/8 Zoack
I Series:G – 1/48 Flame Portal
G – 1/48 Flame Portal
G – 1/48 Flame Portal
G – 1/48 Flame Portal (Stamped)
G – 1/48 Flame Portal (Stamped)
G – 2/48 Cavern Portal
G – 2/48 Cavern Portal (Stamped)
G – 2/48 Cavern Portal (Stamped)
G – 3/48 Light Portal
G – 3/48 Light Portal (Stamped)
G – 3/48 Light Portal (Stamped)
G – 4/48 Wind Portal
G – 4/48 Wind Portal (Stamped)
G – 4/48 Wind Portal (Stamped)
G – 4/48 Wind Portal (Stamped)
G – 5/48 Atlantic Arena
G – 6/48 Shadow Arena
G – 6/48 Shadow Arena (Stamped)
G – 6/48 Shadow Arena (Stamped)
G – 7/28 Flame Arena
G – 7/48 Flame Arena
G – 7/48 Flame Arena (Stamped)
G – 8/48 Sun Arena
G – 9/48 Dual Elfin
G – 9/48 Dual Elfin (Stamped)
G – 10/48 Vulcan
G – 11/48 Hades (Stamped)
G – 12/48 Mega Nemus
G – 13/48 Cleansing Fire
G – 14/48 Mudslide Nexus
G – 15/48 Radiant Nexus
G – 15/48 Radiant Nexus (Stamped)
G – 16/48 Hellstorm
G – 16/48 Hellstorm
G – 17/48 Overhang
G – 17/48 Overhang
G – 17/48 Overhang
G – 18/48 River Valley
G – 18/48 River Valley (Stamped)
G – 19/48 High Ground
G – 19/48 High Ground
G – 19/48 High Ground (Stamped)
G – 20/48 Dark Tunnel
G – 21/48 Mirror Gate
G – 21/48 Mirror Gate (Stamped)
G – 22/48 Prism Gate
G – 23/48 Trap Door
G – 24/48 Darkness Chamber
A – 25/48 Rainbow Portal
A – 25/48 Rainbow Portal
A – 26/48 Rainbow Prism
A – 27/48 Taking You with Me
A – 28/48 Colorvoid
A – 28/48 Colorvoid
A – 29/48 Flames of Light
A – 29/48 Flames of Light
A – 29/48 Flames of Light
A – 32/48 Darkfire Blast
A – 33/48 Char the Earth
A – 33/48 Char the Earth
A – 33/48 Char the Earth
A – 34/48 Bathed in Light
A – 36/48 Colorstorm
A – 36/48 Colorstorm
A – 37/48 Helios
A – 38/48 Scraper
A – 39/48 Klawgor
A – 40/48 Leefram
A – 40/48 Leefram
A – 42/48 Shadow Vortex
A – 42/48 Shadow Vortex
A – 43/48 Shadow Lash
A – 43/48 Shadow Lash
A – 44/48 Rain of Shadows
A – 45/48 Red-Green Combine
A – 46/48 Blue-Green Combine
A – 48/48 Old Enemies
A – 48/48 Old Enemies
M Series:A – 1/4 Magnetic Attack
A – 1/4 Magnetic Attack
A – 1/4 Magnetic Attack
A – 1/4 Magnetic Attack
A – 1/4 Magnetic Attack
A – 2/4 Baliton
A – 2/4 Baliton
A – 3/4 Metalfencer
A – 3/4 Metalfencer
A – 4/4 Turbine Helios
N Series:G – 1/48 Gloomy Gate
G – 4/48 Reflection Gate
G – 4/48 Reflection Gate
G – 7/48 Ocean Spray
G – 12/48 Light in the Dark
G – 15/48 Lightning Field
Foreign:G – BA012a-CO-SM-B Reversal 250 HSP
G – BA033-CO-SM-B Point Slam 200 HSP
G – BA036a-CO-SM-B Black Hole 250 HSP
G – BA036a-CO-SM-B Black Hole 250 HSP
G – BA068a-CC-SM-B Robotallian 150 HSP
G – BA073b-CC-SM-B Serpenoid 250 HSP
G – BA083a-CC-SM-B Falconeer 150 HSP
G – BA081b-CC-SM-B Serpenoid 250 HSP
G - BA103-NO-SM 350 HSP
G – BA114-NO-SM 350 HSP
G – BA121-N)-SM 350 HSP
G – BA123-NO-SM 300 HSP