Depends entirely if you're on a server or single player, while on a server it has authority over the maximum number allowed (not minimum) and so if the server's config is two, no matter what yours is, you'll still get two, however if the server allows for 10 bars, and yours is set to two, then you'll have two...
In single player yes it sounds like a bug, although this doesn't sound like a singleplayer issue since nobody else reported it so far..