When I log into Lubuntu now, the panel isn't all the way at the top of the screen. There's a screenshot here. This has been happening since I started using multiple monitors on my system, but it happens every time I login, even if the second monitor is not plugged in/turned off.
I can get it back to the top by setting it to the bottom edge and then the top again, but I have to this each time I login. Any idea why this would happen/how I can fix it?