But from an accuracy perspective, here's what you're seeing:
warblade: full BAB (3) + 2*Str + weapon (assuming at least +1 for mwk)
monk: medium BAB (2) + Dex + Wis - flurry (2)

So the warblade's attack bonus must be 4 + 2*Str, while the monk's bonus is 0 + Dex + Wis. Looks like the monk has excellent Dex and Wis while the warblade has unexpectedly low Strength.

Although, given that his character has slightly more hp than a warblade despite having a hit die three sizes smaller, I've got to wonder where all the warblade's stat points went. Int and Cha?