How much torque do you give stabilizer jacks once they have touched ground? I give a little extra to "tighten" the jack so maybe it raises the frame an inch... However, I find that not long after we've been walking around the trailer, it starts to shift and when I check all the jacks inevitably one of the jacks is no longer touching the ground (or pad if I've used one) so I have to torque it some more. Am I doing something wrong?