There's been a couple of mentions of not being able to run mix mode.
http://phogue.net/
This let's you do it apparently.
Thread here.
http://forums.electronicarts.co.uk/battlefield-bad-company-2-pc/928536-mixed-rotation-server-2.html
I've not played the other modes...hth.
Acid has found a method of doing this with a new admin tool. Awaiting confirmation that the game will be continued by DMW and he can put in the hours to set it all up. (Sorry to dump you in it Acid...you did volunteer :P)
Meh, yea i did. Gona post about the new tool today.
I think we are likely to renew, final decision I am hoping will be made this weekend and posted up to the community.