I also do not reorder the items by date, at least not intentionally.
I (incorrectly apparently) have already assumed that i got my items sorted in the order in which they are displayed in the XML file (in the feed) but it must not be the case as far as I see in your case but also in hanslopevillage case.
I can however introduce a new sorting order in order to set them sorted by date soonest to latest in my next version.
But can you give me the feed which you use that you find reversely sorted by my plugin? I can run a few tests.
Stef