I'm not sure what's going on with the block-matrices tag. I recently tried to tag a question as block-matrix related through an edit, but when I did the tag didn't show up.
I can look up the (block-matrices) tag in the site's tags tabtags tab to find that there are currently 172 questions with this tag, but clicking on the tag itself redirects me to the list of questions tagged with (matrices). I tried to duplicate this event with defunct/burninated tags, but those don't show up in the search.
So what gives? What's going on here?