Using the PSP version.

Why is this? I can't see why. These are the stats:

Warrior Lv. 8
STR - 14.....ATK - 23
AGI - 11.....ACC - 47
INT - 2.....DEF - 18
STA - 17.....EVA - 51
LUK - 11

Thief Lv. 8
STR - 11.....ATK - 15
AGI - 18.....ACC - 78
INT - 3.....DEF - 5
STA - 6.....EVA - 70
LUK - 19

I don't get it.