Card Tips talk:Sonic Shooter

If Sonic Shooter is equipped with "Twin Swords of Flashing Light - Tryce" and attacks directly twice, I think this will happen:

Attack 1! Inflict 800 (13-5) Battle Damage!...Original ATK becomes 800... 500 deducted from new original ATK

Attack 2! Inflict 300 (8-5) Battle Damage...Original ATK becomes 300...500 deducted from new original ATK

...Or am I missing something? I say this because there's a tip like this on the Tips page.