Ok.... thanks all. Sounds like I've been doing it a bit wrong. Example... last campsite was low to the rear and left. I would lower the rear jacks down, raising the rear until almost level.
Then I would lower the front until they touch, then raise the left side to get it from side to side.
I've also tried using the orange blocks in the rear to limit some jack travel... this last time I used one more block on the left side than the right, thinking that would make it easier on the jacks.... because I've found that when they extend too far, it pops the external breaker.
I'll try following the directions next time....