You could take a look at this?
Version 2.0 now available
Please try out the easier to use Version2 .
Purpose
This smartapp simulates the Entry and Exit Delay parameters currently missing in Smart Home Monitor (SHM), allowing for some time on entry to disarm the system, and time to exit the facility without triggering an alarm.
Entry and Exit delays operate on contact sensors selected in Delay Profiles. SHM is generally fully armed while using this smartapp, tripping a ‘non-delayed sensor’ immediately triggers a SHM intrusion alert. This means a motion sensor that ‘sees’ a door with a delayed sensor, or ‘sees’ a arming/disarming device such as a keypad, may trigger an intrusion alert while you are arming/disarming the system. Motion sensor issues may be mitigated by specifying the motion sensors in the Delay Profile.
A…
You would make a simulated open/close sensor to mimic your door. Instead of adding your actual open/close sensor to SHM, you add the simulated one. The simulated one mimics the actual sensor after a delayed amount of time, thus fixing your issues.