Make sure you check the database id when getting a corruption message. I sometimes see the corruption message in temdb - database 2.

Server: Msg 605, Level 21, State 3, Attempt to fetch logical page (1:39296) in database 2 failed. It belongs to allocation unit 72153958174228480 not to 5188243200689831936.

It turns out, a trace flag was somehow removed (or never added to the service start up) and the need to add back trace flag 4199 back to the server for 2008 R2 SP2 with the command dbcc traceon(4199, -1). This usually happens when someone forgets to put in it the service startup line.