I think what you MIGHT be hearing is the wood frame UNDER the floor settling into position on the frame after you have leveled the coach. The wood in the subfloor and the plywood on top of it as well as the hung walls have to be able to flex a little as the coach moves and flexes, when you level the coach you put the frame and thus the subfloor in a twist from natural as you level the house on uneven ground. We experience that to some degree often and I agree it can play with your mind but I really do not think that it is anything to worry about. In fact, quite the opposite, house is moving and adapting to the frame and thus relieving stress on the house that could otherwise cause cracks and breaks. All just my opinion.
2014 Lincoln MKT