I just checked Mostly Music’s Facebook page and didn’t see that.
The page you saw (Mostly-Music) is a fan page and is not controlled by Mostly Music. The official page (MostlyMusicFB) was deactivated so you didn’t see it.
I expect that dash is correct, although I couldn’t check, because social networking is not allowed by my filter (as per my instructions to the company that administrates it).
The article which I posted was copied from a different website.