I’m sorry you’re running into this problem. It’s hard to tell from your description, but I suspect that the problem you’re seeing is a known compatibility issue with the interface code in WP 3.3 and later with FWP version 2011.1019. If so, this issue has been resolved in the Development Version of FeedWordPress available at <https://github.com/radgeek/feedwordpress> or under “Other Versions” at <https://www.ads-software.com/extend/plugins/feedwordpress/developers/>. If you feel comfortable installing a development version, this should immediately resolve the problem; if you’d rather wait on the next official release, that should be coming out (hopefully early) in August.
Hope this helps. If you do install the Development Version, let me know if this resolves the problem you’re seeing; or if not, what kind of layout breakage you are seeing.
-C
