Mercurial Branching Oddity

Question

I'm trying to understand why the below is occuring:

It appears that I have started another branch, but it has no name, and I do not remember creating a new branch. Why did this new head(branch) get created? How do I keep it from happening?

Answer 1

This will happen if you update your working directory to an earlier revision and start making changes from there. After the "fix broken link" commit, you did a hg update that brought you back to the "secondary address update" revision.

It's easily fixed by first making sure that your working directory is at the tip then hg merge -r fix_broken_link