Board Thread:Skyrim/@comment-109.149.81.180-20140113021915/@comment-50.33.209.6-20150128034551

It sounds like completing the quest sets a variable that sets the chance of the extra gems to spawn(or not spawn). In that case, removing the perk or magic effect won't deactivate it.

Find the variable changed and use SetGlobal to remove its effects. In this case, setTGProwlersProfit 100(the starting value).