I would think if you have already re-run the initial set-up over and over enough times to include all the zip codes I listed, you will have most of the channels you're looking for. As I stated; and in your last quote you state of picking up 13.3 by running it again. The AM21 will only pick channels up that are being received at the time it goes through its set-up process. Plus you may lose a channel you already have if it's not being received at the time of the set-up. So 13.3 was being received the last time you ran a set-up and 48.2 probably wasn't. I would make sure your receiving 48.2 on your antenna and just re-run the set-up process with the same 2 zips.