I think it should be the version of posts within 15 minutes (if I am remembering correctly) after published. It will be more matched with forum data. Only posts edited after 15 minutes will be shown with editing history and last editing time.
are all my edits within the first 10 minutes also logged?
No, edits in the grace period are not logged.
btw, is this still the same TradeFortress?
Probably.