I think I figured some of it out. Turns out I had an additional computer name in the drop down menus that wasn't there initially. My computer name is MIGGITY (I didnt name it :P), but instead of choosing MIGGITY in the dropdown I have to choose miggity.hsd1.wa.comcast.net.

I'm pretty sure it has something to do with my network interfaces. I have a Hamachi interface installed which shows up first in my network connections, and was being used by default on the main computer's client to connect to the multiboxserver.

Once I disabled my Hamachi interface, the normal lan interface is default and the screen spanning worked.

So now the mouse moves back and forth across the screens, and the keyboard works in both places when in windows, but the keyboard does not work on the secondary computer when in WoW. I tried it in broadcast and normal mode but no dice using my desktop keystrokes on the laptop for some reason.

It lets me pan the mouse over there and back but never lets me use a keystroke when in either mode. I doublechecked and reset the settings so that nothing was excluded with no change. All keys work in windows but none work in WoW.

Thanks for your help btw