On my friend's 08 HR Scepter, the door would lock when the key was turned on. On my 08 Camelot, built 3 weeks later, my did did not lock when turning key on.
Both coaches utilize the TriMark system for door keypad, remote, etc. If yours uses TriMark, there is an option to change whether your doors lock when turning key to on.
What system was used on your coach?
2008 Monaco Camelot 40' PDQ