It also looks like backlash to me - and for most any telescope and any autofocus system it is recommended to take the through-focus curve while pushing up against gravity.
In SGP the autofocus curve is always taken right to left - from high numbers to low numbers - and you need to make sure that direction is pushing the focuser up against gravity. There are ways to change the direction in SGP and possibly in the focuser itself - but it tends to be very confusing. Nonetheless - it needs to be set up right - and you can tell just by watching the procedure while looking at the focuser if it is working right.
At the start of the autofocus run the focuser will go to high numbers and overshoot the right side to take out backlash. And watching the focuser you should see it drop downward with gravity as this happens. Then it should unwind backlash and push up - then start taking the curve from right to left.
It takes some experimentation to get it all set up right - but after that it should just work.
It's better to have too much backlash compensation than too little.