I just went to my 'update notifications on the Profile page' on wpmudev. There is a website 'wpsingle.net' that is NOT mine. I immediately disabled it, went to 'whois' to see who owned the domain!
Low and behold, my bold 'friendly hacker', the person who had control of MY domain (barackobamachange.com) for the last two days. The person who forced me to delete my domain name off of my server. The person who has caused me such headaches - lives in China!!!
Mystery solved - like the kids say 'Gots to be more careful'!