Glad you've got it sorted now. Have you worked out where you went wrong in the first place? Backing piece too small? Sandwich not correctly aligned?
I've never had this happen, but I did discover the hard way last time I basted something that if the backing has a very obvious, large repeat, you need to get it centred properly. I ended up with my cheery owl print at a bit of a jaunty angle, with the owls getting cut off at a slightly different place each time they turned up.