I have a DXF file that I import. If I do nothing  - just simply select any one of the chains everything acts as you expect. Press Auto Clean and now the 3 smaller chains all get selected when you try to select just one. I put an offset on it and it offsets just the one chain - you can not offset the others. I tried all the DXF output types R14 had - same thing.
Bill

Hang on for a week until the new version is out, this fixes lots of problems.

Graham.