Finding tickets by Trac #number, or by author

(This might be a RTFM, if only I knew where to find the FM.)

• In the search box, there seems to be no label for issue #number(?) If I put the issue number direct, it finds nothing. Compare that in Trac you could put #10675 and it would jump straight into the ticket. (GitLab search seems to sometimes show other tickets that mention the one I want.) Am I too much of a sad-o that I know ticket numbers by heart?

• The author: search works for me, but weirdly. Is this expected behaviour? My username on Trac was AntC. To search I need author: @trac-AntC, even though the tickets show bare AntC. And I can't get sign-in to AntC or via its email address; neither via my GitHub handle which is AntC2; so I've created a new user for myself.