> Did you have to manually click “Create Patch” to make roundup generate it?  

Yes - the first time too.

> Did you try first to click on the button of the existing repo before adding a new repo entry?

That would probably have worked fine. The "Remote hg repo" field was just empty when I made my latest comment, so I filled it in again. Wasn't sure if it would duplicate, or be smart enough to tell they were the same repo, or what. I guess it duplicated :/