Haley has leveled up several times since she said that her Bluff skill was maxed out back in strip #412. We do not know if she continued to spend points on Bluff. (It seems likely that she would, but we do not know it with for sure).

Maybe her stats should change from 'maxed out Bluff skill' to 'at least 13 ranks in Bluff' since we know she was at least 10th level at the time.