Except we are referring to No.3 ... Even if it was a bug, it really has NO effect on game play, you can't switch class in the middle of an instance or in siege so what does it matter? There isn't any point fixing a bug like that when there are so many others that actually effect game play.
^ That.
Sure, it's a bug, but when are you going to notice this? While fooling with skills next to a house maid, or in your house? Why does it even make a difference there? Like mentioned above, there are a lot of bugs that actually matter. This one isn't even noticeable and doesn't affect anything.