Magic Weapon spell to hit bonus

I don't seem to be getting a bonus to hit when my weapons are enchanted with Magic Weapon, neither on the character sheet nor the combat logs. The damage bonus is showing up, though.

Did you cast any other weapon buffs? Magic Weapon and GMW seem to work fine, but multiple weapon buffs mess things up at the moment. Flame Weapon after GMW, for example, adds the Immolate effect, keeps the Magic Damage effect, but removes the Attack Bonus effect. Multiple castings of the same spell tends to add multiple instances of the same effect (which don't stack, by the way). If you cast Magic Weapon, Flame Weapon, Keen and Magic Weapon again, you'll have one of each effect (Attack Bonus, Magic Damage, Immolate, Keen). This sort of behavior is true for all weapon buffs probably, tried MW/GMW, Keen, FW and Bless Weapon. Not sure if weapon buffs are supposed to remove the previous with only one active at a time or work as in normal NWN, but it does neither.