Bugged Dmg on xAA xBow.

I just uped to +15 a xAA xbow since it might give more dmg than my xcelestial+15 I'm currently using but now I use it I noticed it gives less dmg though it says it has more attack power

SSs:

xAA xbow and xCelestial bow +15+L+edr both (look at attack power):




DMG to Resurrected Gladiator with AA:



DMG to Resurrected Gladiator with Celestial:




See, it's Celestial>AA when it should be AA>Celestial