no its not a bug you just don't understand the ui
the fact you have a kit makes it give you a +1 to the dice roll and it doesn't use up the kit because you managed to make your roll
lock picking kits are only used up if you fail the roll... from memery trap disarm kits are also used up if you fail but my thief only ever fails on a roll of 1 and i always burn a reroll if this happens so i have not fails a roll this patch
