[Zubersoft]

If you modify the file and add additional metadata, then it's no longer going to be identical, and you should get a conflict dialog if importing the song again. As far as the second issue, the title specified in the PDF metadata overrides any other selection. I'll have to add a checkbox on the dialog that is only shown when "Extract PDF Metadata" is enabled that determines whether song titles will be derived from the PDF metadata if it's present.

Mike