What Can Be Said To Exist?

Polaroid 600SE with Mamiya Seiko 127mm f4.7.
Fuji FP-100C peel apart film.
Double exposure.

I always have this problem with the film sheets getting out of order and being masked by previous sheet (hence the black block to right of image). I'm not sure how to remedy that...think it may be to do with the tension of the back or something?

More photos by mjanekerr