Wow, I re-scanned as you suggested and 28.1 and 28.2 are now appearing as 28.3 and 28.4 but the signal no longer appears on 53-1. I guess the storm blew out a couple of circuits.
The re-scan discovered more weirdness, I am now getting 38-3, 38-4, 38-5 and 38-6 PBS out of Jacksonville when I used to get them (as expected) on 7-1,7-2, 7-3 and 7-4. Maybe the problem is with my receiver also even though it is on a UPS/surge protector. It works but it is odd.
Thanks for the suggestion to rescan. It would have taken me a long time to do that. I am using a DVR HR-10-250 Directv Tivo.