Well, I had a similar problem yesterday. In that case, I somehow grabbed it and could only move it up? I kept trying to move it down and it kept going up. But then I stopped and clicked it again, on the top, and it moved just fine, up and down, side to side. I have no idea what I was grabbing that it made it just move up. I don't believe I was resizing it, since it was the normal size once I finally was able to move it.