I have a maintenance question about tags (I'm a temp. moderator on cstheory.SE). When merging tags, the spec says that the Master tag will exist after the merge: however, if I try to merge an existing tag into what will be a brand new tag, the system croaks (complaining correctly that the Master tag doesn't exist yet).
The only way to fix this is to create the tag by retagging, but then this bumps up a question to the top of the front page for no good reason.
So my question is: is this expected behaviour? It seems to contradict the postconditions specified when merging tags (i.e that the Master tag doesn't need to exist prior to the merge). Also, I was under the impression that moderator relabelling doesn't promote a post to the top of the front page, but it did in this case.