Split screen, offline.. and u still have ure 2nd controller turned off. Maby thats the trick? Dont turn ure 2nd controller back on, and dont leave start.
It remembers me of something when i was online with 2 friends i pressed start to set something up and few zombies start hitting me and i diddnt died, when i pressed start again i started running but died also (yes i had jugger-nog) but they hitted me like 8-10 times when i was in start..