If you over wrote the map in game then unfortunately you wont get it back. Steam made this feature so that you could keep going on the same save file no matter what computer you are on and no matter where you would be.

My advise would be to either be a little more careful on how you save your games ...

Just spit balling here but when you both LAN into the router do you turn off your Wifi card on your laptops.

I have run across older laptops that prioritize wireless over LAN but have not seen it in a while. I am thinking it could be an issue with too much information running over his Wifi

I forgot to mention that this is the only game I am having issues with. All other games work with no issue

Situation: some buddies and I want to play a multiplayer game

Issue: When hosting, buddies start download and end up automatically disconnecting due to latency issues and I disconnect from them for same reason when they host. They have no issue connecting to public servers or each other while I ...