Stepmania Online

I was playing with Owen & Spooky, and they selected Bokura no 16 bit warz.
It gave me the wrong version, so I went to change the right version and I accidently went to Boss Battle RX and somehow we all played that song instead!

Is this a bug or something?

http://stepmaniaonline.net/index.php?pa ... id=2004031

So what you are saying is that when you were placed on the wrong file, somehow hovering over an unrelated file made everyone play that instead? I haven't seen that before if that's what you mean, and I've been in that situation many times. If you get placed on an incorrect file (which can happen if a song has the same title and subtitle) typically being on an unrelated file would just move you back to the incorrect file and start the song. Perhaps you accidentally selected the file and didn't realize it, or someone else did. If you encounter it again with a way to repeat it, it should definitely be looked into. That bug could make selecting files a huge pain, and perhaps even cause crashes if it's recreatable.