On inspection it turned out that only one question had that misspelled tag. I therefor submitted an edit so the tag was no longer used on any question. Once the edit was reviewed and approved there were zero questions with the misspelled tag.
After 03:00 UTC the system runs a cleanup batch to remove so called "zombie" tags.
The timing of all actions was ...
One possible change could be to change focus to input-focus. This seems to make some sense, since it had originally been keyboard-focus in the first place. Input-focus provides greater scope than keyboard-focus, but limits the application of the tag closer to what it was intended.
I've applied the tag wiki to the correct style-guide and have re-tagged the relevant questions.
The style-gude tag will expire naturally overnight I believe, provided nobody re-uses it for other questions.