The top level is perhaps the least accurate of all. Torpedo levels are very popular and you need to make sure you check at 90 degree intervals around the tube
The inline meter must come out once it has done its job and you've moved on to dithering with the satellite receiver.
Finally, it usually goes faster if you preset elevation and tilt according to the best numbers you can get (
Satellite Finder / Dish Pointing Calculator with Google Maps | DishPointer.com).