OK, due to some demand, I am starting a referential diagnostic guide, for troubleshooting problems with custom domains. It's going to be a bit high level for a while, and look like an outline (Cliff's Notes?) while I develop it. After I have a while to fill in the holes, I'll make it pretty.
So be patient, and let me get the top level issues stated, first. Ask in Blogger Help Forum, for help using the procedures.