Yeah, it's pretty bizarre isn't it?
Very.

AFAIK, you also have to level up after talking to Mjoll in order to get the Grimsever quest (as well as possibly being at a certain point in the MQ). [emphasis added]
I don't know if that's the case because I put off the MQ for a loonnng time on my chick. I did Grimsever's Return pretty early on because I did the DB and TG quests way before doing much in the MQ. That being said, I was
at A Blade in the Dark when first went to Riften so maybe I was far enough.
