Since this morning i have been straggling with the status manager problem .
the Project summary task status manager was the Server admin and not the owner .
this caused that some of the users trying to submit new assignments but its going to the project owner .
after trying for like 3 hours to change the status manager on the summery task and the simple solution is
the summery task status manager is the last user who published the project :D
hope this will help you