Don't worry it happened to me too. I think it's a common glitch. It fixes itself kind of. Yeah I think it happens when your old tama dies and you reset.
It might not be a ball, look closely If you are confused, take a look at -Ra- 's V3 Shop List Many items can get confusing at times and can get mistaken for other items which look similar to it, but if you look at all the Shop Lists' -Ra- has made for every version, you may just find the solution Good luck !