FeedWordPress Conflicting with BluBerry PowerPress

We’ve been using FeedWordPress to aggregate a number of blogs into a central clearing house site. Recently, we’ve added the BluBerry PowerPress plugin in order to take some other content (video and audio) and generate a podcast feed to supplement our blog feed.

Since doing that, however, FeedWordPress is resyndicating blog articles that have been either Zapped (Retired) or previously published. We’ve verified that disabling the PowerPress plugin seems to be correcting this problem.

Does anyone know what changes would need to be made to either Bluberry or FeedWordPress to prevent this behavior?

Thanks!