No one was bothered that Mike was actually a celebrity. After a few years, the world forgot Mike ever played Mr. X. That year the drumline did not win championships. This was because half the pit didn't practice their music during their detective adventures. The other half was still in shock from finding out Mike was Mr. X.
The next year the drumline did win championships because they did practice. And mostly, the pit realized they had a great pit instructor. The group didn't have as many adventures. The pit has all kind words for Mike, even Josh who was kidnapped by Mike. At the end of the year, the older and the younger to the pit became a family. The drumline never went to school on a ship ever again, but they did go to Hawaii. But that story is for another time.