The reason I'm asking this here is because I can't post questions in the Facebook help section—I don't know why.
I can't find the "Musical Instrument" category in my page settings. I looked at every single one. I know it exists. See for example https://www.facebook.com/GibsonGuitar
Best Answer
Sorry I don't have a complete answer, but I reported it to facebook and they have yet to respond. My page (http://www.facebook.com/VoyagerSaxophones) was categorized as Music Instrument until recently but I noticed that it had changed to just 'company' at some point in the last couple weeks. I'll update if they answer.