I know this is not a big problem and I'm pretty sure it is the same for everybody.
Let's say I'm watching a channel from 28.2E but then I change to a channel at 1W. The rotor moves the dish but suddenly I realize I zapped to a wrong channel so I zap to another one on the same satellite. At this point the rotor stops for a couple of seconds and then starts to move again.
I assume it is very hard to prevent rotor from stopping when switching channels on the same satellite.