Expired Post with More Recent Time Stamp?

I am pretty sure that what you are looking at are post revisions. The posts with status “expired” are the primary post. The ones with “inherit” are revisions or autosave. Look at the post_name column and you should see a pattern like **-autosave-** or **-autosave-**, and then look at the post_parent column and your “expired” post ID should match. The primary post– the parent post– is apparently the one that matters to whatever software works out the “expired” status. So, yes, I think that is your issue. I don’t know why or how your posts got the “expired” status.