Hey  @opetersen ‌ - I'm not sure how or why but I did seem to shake it loose somehow. First, I noticed that the module into which I wanted to add an assignment included a prerequisite. I'm not sure if that makes a difference but it seemed relevant. I unpublished the module and then republished it. And when I did that, I was prompted to Re-lock the module since I touched the progression requirements. I accepted.

The assignments I wanted to add were new but I had changed their names since creating them. I was now able to see the new assignments with the old name and add them to the module. I then removed them and when I tried to add them again, the new name popped up.

You are probably right about the time fixing the problem - a lot of fiddling about. :smileyconfused:

Adarsh