That's one of my pet peeves. There are lots of instances of game text that don't do what they say. (I used to work for a CCG company, and writing unambiguous game text to fit on a playing card is a challenge but is a skill that can be learned. Not doing it is just sloppy design and makes it harder to play/understand the game.) Stuff like "Double movement in forest" drives me nuts. The actual functionality is clearly not double (x2) when you see it in practice. Especially when you combine it with things like Kilimanjaro, the discrepancy is pretty obvious.