Can't run import without editing after a different feed is imported

I have two feeds I want to import using the same endpoint and a custom fetcher and parser. The first is to import media; the 2nd is to import nodes which I then reference in the imported node. I'm also setting custom variables so I can use a starting point and offset so as not to import the entire feed in one session. I'm having an issue when I run one import and cannot run the other without editing and saving. It insists I delete the items. Deleting the items, though, does not solve the issue. I still must edit and save before I can run the import.