Seems I may have the same problem with the air shocks. I do not check them often, but when I do they are always at zero. I use the hand pump to fill them. The other day I put 25 lbs in, going to wait a bit and recheck. You will loose a few lbs when you remove and attach the pump, will take that into concideration.
2008 Vision Black gone 2005 TC- Sold
1963 Triumph Bonneville,not sure on color-be awhile
1983 XS 650 Custom Midnight Gold
2007 Ural Patrol Black-Sold
2011 Cross Country White and Silver
2012 Cross Country Red and Silver--Hers
A bunch of other bikes over the years, mostly all good
Life is short, eat dessert first, simple enough.
N/E Georgia and my garage