PensDynasty87,
I had this same problem & it was irritating to the max. But I figured out a solution. When you go into the shop, choose yes to add the remaining tattoos that you have available. Yes, all your tattoos will be gone but you have to use every single tattoo that you have available. Cause if you don’t, you’ll keep running into the same issue. Once you use all the tattoos & leave the shop, you can reenter the shop & your tattoos will stay on your body when choosing new ones. I hoped this helped.