centuple (or more) exposure

i had and do still have trouble with my exa. all the rolls of film i recently put in were ripping in the middle and/or weren't simply transported right. so i ended up photographing the most awesome motifs just to get another, almost blank roll of film back from the lab. so frustrating!
the only good thing about it are those pictures that i exposed about 10 times, not knowing that the film wasn't transported.
i keep hoping the problem solves itself...