Feedwordpress has an issue with creating duplicate posts. This duplication does not happen predictably, however, so it is hard to debug it. I need to be able to reproduce duplicating posts before I can go any further. Has anyone been able to reproduce duplicate posts when a feed is updated using feedwordpress? If so, what steps did you follow to force a duplicate of a post to be created during an update to the feed?
As an additional note, I do know that the GUID database field is not set in the duplicate post. This is one of the ways I am able to distinguish duplicates from the original. There could be 5 duplicates, all of which have no GUID set, but only one original with the GUID set.