automatically switched to topic confusion

[Chuck Tuffli]

This is my first real interaction with Heptapod and I'm a little
confused as to what happened. Thanks in advance for bearing with a
n00bie.

I had been working on a documentation update (topic ctuffli-doc) which
was merged upstream (thanks!). Today I wanted to work on a new set of
updates and somehow ended up on a new topic:

$  hg version | head -1
Mercurial Distributed SCM (version 5.6.1)
$ pip3 list | grep evolve
hg-evolve                     10.1.0
$ hg topics --current
ctuffli-doc
$ hg topics --clear
$ hg topics --current
no active topic
$ hg branch
stable
$ hg pull --up
pulling from ssh://hg@foss.heptapod.net/mercurial/evolve
remote: X11 forwarding request failed on channel 0
searching for changes
adding changesets
adding manifests
adding file changes
added 83 changesets with 341 changes to 99 files (+9 heads)
380 new obsolescence markers
obsoleted 15 changesets
1 new orphan changesets
new changesets b56d07c41044:ceb1dfe19071 (49 drafts)
switching to topic ctuffli-doc-2
85 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg stack
### topic: ctuffli-doc-2
### target: stable (branch), 2 behind
s1@ doc: move introduction to separate file (current)
s0^ doc: update MQ To Evolve refugee book (base)

The intent was to abandon the topic, thus the --clear. Should I have
done an `hg up stable` even though it was already on the stable
branch?

Also, how did I end up on a new topic with a similar name?

--chuck