I think mine may still be a mess but I do have some updates on it.
I did send an email to support, so I have a case opened. In the meantime, I was looking around and found that at least my missing door sensors seem to be missing because of a difference in the apps. I use the AD2Pi device to attach smartthings to my Ademco alarm panel. In the old smartthings, the sensors show up as security sensors and I just had to find the right zone and label/name it to the right door sensor. So in the old app, it was working perfect. In the new app, none of those were showing up. Now it looks like they are there but they have a different name/label again. They have some kind of security device label again. So I have gone back into the new app and renamed/labeled those devices again. I have not had time to test them all out yet but at least my front door seemed to be showing correctly.
This is all such nonsense. I was 100% happy with the old app. Now I am just at a guessing game of what is missing or any integrations that will fail to work. This is on top of having to learn the new app to find where things are now. Its a shame that this is happening.