@Miranda-Gage Weird, that never happend to me. Maybe the CC you used on the horse showed up as a different files instead of one
I would try merging the packages and then doing the other sets or you could open every package (I would start with the largest one) and then looking through. It shouldn't matter because one of the files has to contain the marking.
If you can't find it, then you did something wrong, but I don't know what I would suggest saving the horse without any CC apart from the markings and trying again.