Bug/Issue Buying the recipes at the end of Robin's list

I wandered into Robin's store, and decided to buy all the recipes she had at the time, since I had a bit of spare cash.

I scrolled down and started at the very bottom of the list. Clicked the bottom-most recipe, bought it, it disappeared from the list. Clicked the next one up, but instead of getting that recipe, I was suddenly holding a plasma TV, and said TV's entry was suddenly under my cursor instead of the 2-3 slots up it was before.

I tried it again; bought the recipe at the bottom, then clicked the next, and same thing happened, except I was holding a budget TV.

It seems when you buy the bottom-most item while scrolled all the way down, it autoscrolls up a bit, but doesn't quite update the window.