No Problem
I can't figure out why it did that to you either, particularly if you have an American Dreamcast anyway, unless it just found a particular file on your VMU that it liked, and tried to work with it. Like Magelexx said, that was the only game which had that option anyway.
I preferred it in Japanese actually, since it's not a problem for me, I'd already been playing the JAP version since I got my DC in late 1998, and that little bastard from Star Wars who did the voice of Tails drove me crazy.