CORRECTION, MY MISTAKE: First, thanks for your help! The Altimeter on FG Version 2017.1.2 & 2017.1.3 & 2017.2.1 all act the same when weather environment is set to Fair Weather, the altimeter does not shake down about 400 feet with Cessna 172p idling on runway. However it does when weather environment is set to Core High Pressure.
Sorry for the confusion and thanks for helping me clear this up