[whpalmer4]

I can only reproduce this by editing the list in such a fashion that I change one of the existing entries, rather than adding a new entry and dragging it into the appropriate spot on the list. Otherwise, it seems to work exactly as I would want; adding to or subtracting from the list doesn't affect any of the existing entries, so long as they didn't use the values added or subtracted.

Does that explain what happened to you?