I am very surprised that you were able de create a subject with multiple tags. It is still not working for me and I suspect one specific point.
Each time I create a subject, it is not moderated by default, following my rights on the forum. This is not your case. Your subject was put in moderation queue, and its appareance is good (excepting the case problem you detect)
My subjects do not go in moderation queue and their display are wrong, even if I paid attention to the case matching problem.
Maybe a clue...