Well I'm not the best with images.. and I know nothing of the copy of elemfm2 but I bet something (a lot) is missing.

I would retry.. this time either use cp -pr from command line (and seeing if it fails trying to copy any files)... or some kind of combo of gzip/zcat or a dd if= of= or something along those lines to get an exact copy..

I'm trying to google to find a way to extract an ext2 image to partition... will post if i get/find a step by step..