I had the exact same issues the other night.
I noticed that the SeeStar would not locate any targets, I found the focus so far out you could not see any stars. Using the manual focus control I found focus, (1303) then reset this focus position into the default settings, I was then able to locate my chosen target, however once on target I tried another autofocus, which went way out of focus and said ‘Autofocus Complete’ even though the object was obviously blurred.
I manually adjusted back to the position I found to be focussed previously, only to find it was miles off, so when I finally found focus again the position was 1345. I tried another autofocus again, this time it went first in one direction, and then the other unit until finally I got ‘Autofocus Failure’ with the object just a blurry shape.
Once again I manually found focus, this time it was 1273 - It looks as if the Autofocus system is slipping or there is an issue with how it detects focus and then arrives at a position number.
I also discovered if you manually move the focus position too far away from where it should be, the system can’t seem to move far enough to get focus back and fails.
I also found that the focus has exactly the same issues in solar system and scenery modes.
I have sent two bug reports to ZWO complete with logs and photos, but have yet to receive a reply,
but this has all the hallmarks of some mechanical issue in the focus mechanism.
