My door is equipped with a separate double cylinder deadbolt and the residential knob/lever set. The round keyed knob is on the outside, and the lever handle is on the inside. The lever handle is not keyed, but has the small piece you turn to lock/unlock the door.
When you try to close the door, the latch piece does not retract and the door will not close. You have to turn the knob/lever to get the latch to retract, in order to close the door.
Any suggestions for troubleshooting ?