During a very interesting online conversation with a bud, AMR, she pointed out that the team blog problem was resolved a week or so ago, according to a post by Blogger Buzzer in Blog 'in migration' for 5 days. Is that normal?
We modified our migration algorithm to handle this case correctly so other users don't fall to the same trap.
So, I guess we will see if the currently reported problems are related to migrations started before 12/11.
I haven't seen anything in Blogger Buzz, or Known Beta Issues, about this. Kudos to AMR for spotting the forum thread!
Ahyway, AMR asked me for my opinion about the good news from Buzzer, as her church blog was in the same jeopardy. Having read the article, I suggested that maybe it would be safe for me to attempt my migration (subject to my invitation reasserting itself). And a couple minutes later, she reported that hers was done. As you can now see, she is a happy Beta Blogger, and of a rocking good blog, too.
So now I shall see if my church blog can be migrated as successfully, being as the original owner account, of mine, was separated from the blog just recently.