Ford's have a habit of draining the filter after shut down on some engines. How long are you waiting till you pull the filter? Are you priming the filter before you install it? Nothing is behind the hex nut and there is no way that I know of to bypass the passage for the filter. One of the holes is direct from the
oil pump and if the other was pluged you would have no
oil pressure in the engine.
Does not really sound like you have a problem.