The pre-washing is silly, but the post-washing is totally mental. Why on earth would you post-wash a dish? Your dishwasher must be very dirty. Clean the filter, and also, run a few cycles with a couple of bowls facing up in the bottom, then discard the giant globs of dirt that will collect in them when the cycles are done. This is how to rehabilitate an old dishwasher, assuming it is mechanically working ok.
Not to mention if your dishwasher has a sanitize cycle, you are very likely making the dishes dirtier and spreading new bacteria onto them by post-washing them.