Yeah, UM has gotten much more friendly for OOS applicants in the past few years... but less friendly for in-staters.
It's really difficult for us Michigan applicants, as there aren't as many choices for us around here as say Ohio or east coast. There's only UM, Wayne State and Michigan State, and there's a huge separation in the education quality.
StayingSteady...
1. I would say something like "X years (continuing)." They have your AMCAS, so I would just make sure it's as consistent with that as possible.
2. Not 100% sure, but I think it should be fine. Just make sure it's consistent with your AMCAS.
3. UM admissions (from experience) is especially finicky about inconsistencies, so maybe you could add that in your activities and make a note.
4. The UM people have said "do your best." They said that they understand schools are different.
5. Where was this? I don't remember filling out anything like that? (I'm instate.) I only see the "Michigan Residency" tab, but it's just an info page.