[cavemonkey50]

I'm noticing this syncing issue (or one similar) as well.

It seems if I make a change or create a task on the iPhone, then mark the task as completed on the desktop, the task will be returned to the uncompleted state on the iPhone, with the previous settings (time change goes back to previous time, etc.). When I sync with the desktop again, the desktop gets updated to the iPhone state, and both are back in sync.

It doesn't matter if the task is reoccurring, it just happens all the time. I'm doing syncs between changes, so I'm not simultaneously making a change to same task on the iPhone and desktop.

My guess is the problem lies with the iPhone picking up changes made by the desktop when it made a change to that same task, as the desktop always stays in sync with the iPhone. The iPhone is always the one to mess it up.