Dears
User A starts more than a process instance for the same process that has a destination rule that contains him (User A).
User A opens his work list and finds no items assigned for him.
he has all the process rights checked, All the Server Rights checked, and he is not out of office.
if he opens the management tab and drills through processes node to the required process instances , he sees all of them there.
he also cannot see them in the worklists node under the the workflow server node in the management tab