Have an excavator or landscaper properly grade the area.
You should have 6″ min clearance from siding to grade, then 6″ of fall at 10′ from foundation.
Make sure roof discharge is properly diverted away from foundation.
Remember – Last year was one of the worst for frost depth.
fyi – 8″ to 10″ dia footings at first would seem to be a bit undersized. Haven’t seen anything that small in quite some time.
But would need to know the size of deck and how many footings to do the calcs.
Sometimes there is not much you can do to totally eliminate seasonal movement.