Having Issue on the Favourite/Unfavourite Avatar

Im sorry Im having issues where, erm wherever I try to favourite avatar it was over limit the original for example it suppose to be 25/25 but it go 26/25 instead then when I try to Unfavourite one of the favourites avatar it goes 25 and when I count back the avatars that I favourite it was 22 but the Favourite thingy show 25/25 when i only have 22/25…is this some kind of bug? help