Hi David,
Sorry I missed the part where you asked for that, sent it now.
1: The subsequent issues that I've noticed (I don't know if this is a comprehensive list or not):
* Multiple duplicates generating for appointments, sometimes not the same number of duplicates on both clients
* Sometimes added and deleted appointments on one client never show up on or disappear from the other client
2: I'm fairly certain items entered on Outlook for Mac show up on OWA
3: I only tested on my own Mac long enough to verify the error i mentioned was present
4: I haven't tested this on the Windows Outlook
I didn't really go into extreme depth trying to categorize and recreate the sync issues as i assumed they were a result of the appointment sync errors. If my basic explanation of the problem isn't enough, i'll try to recreate the issues for you to give more information if that would help. Unfortunately the sync issues don't happen reliably as far as I know so i'd have to spend some time trying to give a better description of the symptoms.