We have the 6 point level system also. For the first few years of setup, sometimes it was rock steady, sometimes there was movement. We found we have more success when using stack'em blocks to shorten the cylinder strokes combined with taking more weight off the tires using manual level option. Very limited movement now.
I have seen several folks successfully using the steadyfast system with the level up system. I keep thinking about it for myself, but it is far down on the list
As for the creaking and popping, we have none. There are several threads about it. Seems like adding a hydraulic fluid additive fixes most of the noise.
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder