Their messing about with the G+ and the youtube accounts turned out rather messy it seems. They wanted to do that to me as well, but I've been pressing that "Use youtube account" button all along. It was a little irritating, yes, but lately it's calmed down for some reason. Oh well.
Are you sure it hasn't just made a new Google+ page for your Youtube channel name? The move was compulsory, you only got the choice between associating your existing Youtube account with a) a Google+ profile (which uses your real name and each person has one per email) or b) a Google+ page which uses your Youtube channel name and which is attached to a Google+ profile.
I chose the latter, which I kind of regret now because it's just confusing and means I don't get the Google author rank info attached to my account.