StaticSprites Missing While Compiling Animation?

I've gotten my staticsprites in cells and have a total number of 10 sprites within that particular group. When I try creating a new animation from that group TGB without fail removes at least one staticsprite for me to put into the animation timeline. If I use the add all sprites to animation button it'll add all of the sprites, even the missing ones, but there are some animations where I still need to reuse a staticsprite that is missing. Anyone have the same problem or know a fix? Thanks.