I didn't notice the problem until you mentioned it. For me it was obvious that it points up/down, but now that you mention it I see that it could point in other directions as well.
I guess the question is: Do users get confused about the arrows?
I guess the question is: Do users get confused about the arrows?
It might be mistaken for a collapse/expand option, but people have been conditioned that + and - or the down arrow and right arrows are for that.
If it had a stick indicating the bottom protruding from it, it would appear to be a direction rather than an action link.