Hi there, I know this is an old post but i was wondering if you could clarify a bit. Did you end up reinstalling the MP on the primary site? I am experiencing the same thing right now and I am unable to pinpoint the issue. Ive pretty much gone down the same log dive as you did and I am receiving the a lot of the same errors. The properties on SMS_MP seem to be correct on our MP.
We have a pretty flat hierarchy, 1 primary site and 5 DPs.