Jéjé le tech, with regards to my problem I'm having above, both my glitch boxes are connected to the same router with their own jqe accounts and the exact same ports you are using. They do both work at the same time. We got a good hour and a half on Halo 4 last night. Problem is the random disconnection to the Link service... but yes, they should both be able to work simultaneously. It's frustrating at the moment though, as Link is now the only available option for system link play.