There is a test server up for Survival mode at
tf2.festersplace.com:27080
The port number may change later but its there for now to see how things go. Nothing is guaranteed
This server is set to survival only and admin commands do work but it shouldn't change the mode via lobby connects made by other users.
The other 2 servers have been set to Versus mode only so again.. they shouldn't change to coop mode on map cycling. NOTE: Server 1 needs to be restart to implement and as of typing this the server is populate so wont happen just yet.
Enjoy.
PS: The server will be dropped if it causes to much lag on other servers..