2016 Cyclone 4113. We've been stationary for the past 6 mos on a concrete pad. We have noticed that the two rear door side jacks have started to retract on their own slightly. We have also noticed the front landing gear begin to sink and have adjusted the nose when needed. We have checked the hydraulic fluid levels which were a little low but not too low given the slides and jacks are out. Two questions: what would be causing the rear jacks on the door side to retract on their own? and why is the nose sinking?