Thank you so much for the detailed bug hunting <3
story bug 1 - fixed!
story bug 2 - can you tell me exactly where it says cordelia is marrying lisle when you are also marrying him? I didn't see any bugs at first glance so more details will help <3
story 3 - there are bad endings for every background which give you a special bad end - those don't mention your romance / marriage partners, instead things don't work out for your mc or their love life the widow bad ending starts with "You returned home from the summit to Revaire, which soon made you wish you could go back and do the summit again differently." and it happens when you get a bad outcome for revaire. So this might be working as intended depending on if you managed a good resolution for revaire or not
on to the other bugs ~