As mentioned above, this is totally normal, and our dealer took care to go through the whole procedure with us, as our previous coach was hydraulic.
I'll try to give you a rough idea of what is taking place. The slides are moved by use of "linear actuators" which are far from a new idea, and are used extensively in industry for various tasks, being more controllable than either air or hydraulics, as well as cleaner. Basically, the motor turns a gear train, which in turn, through a
over-riding clutch turns a ball screw, which extends or retracts the piston. The clutch is there to keep from damaging the actuator in event of it reaching end of travel, or it encounters a heavier load than it was designed for. The gears and racks you see under the main slides, are connected by a rigid shaft to each other only. This is to keep the slide even on both ends as it extends or retracts. If a linear actuator type slide does not ratchet at end of travel, the most likely cause is low voltage due to a low battery or bad connection somewhere.
Your description is of something totally normal, and your dealer should have demonstrated this to you when you took delivery. Just ENJOY!