Bug with runes

When selecting runes say you have 9 runes of something when you go into your rune pages. If you have 6 already in the page, it will list you as still having 9 on the side bar. Then if you right click the 6 in the page, it will increate to 15 runes. So the side bar always starts with your total, and never subtracts the ones currently on the page. Someone dun bugged that.