I recently had a two stage AC(Lennox) installed which is paired with a two stage furnace. It is controlled with a Honeywell VisionPro thermostat which has been set-up for two stage cooling. We set back the thermostat for sleeping( 76 to 73) and I have noticed something peculiar. It proceeds to 73 fairly quicly but continues to run for up to two hours and still does not turn off. Is this normal for this type of cooling or is there something wrong with the setup.There is not humidity control on the thermostat. Nighttime temps have been in the low to mid 70's. Thanks.