Can't raise or lower roads

I'm having the same issue as here:

http://answers.ea.com/t5/SimCity-2013/I-can-t-raise-or-lower-toads/m-p/1821335#M91005

I go to place a road using the straight tool, press M to raise it and it just places. I don't take my hand off the button.

I'm on a laptop, and surprisingly it works with a USB mouse but it's really inconvenient using it currently, and I'd like to use it with my trackpad.

Is there potentially a fix for this?

Thanks!