Hi and welcome to the forum.
I have moved your thread here to the Class A forum where you'll get far more views. I've also put a more descriptive title on it in place of your screen name.
I believe it is possible for the jacks to lose pressure over time if you have a leaky solenoid. I believe each jack has it's own solenoid though so I would suspect that you are always having to make the same adjustments since the same solenoid is leaking? Before doing anything else though, be sure to check your hydraulic fluid level.
Including the year, make and model of your rig in your signature line will help you get responses more specific to your particular rig.
Best of luck.
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD