Ch 8, 11 & 13 are VHF and ch 8 and 11 come in fine. Would there be something different about 13? If you want to look at my zip on antennaweb.org it's 77493
Thanks for the feedback!
If it makes you feel any better, I live in Sugarland and I lost ch.13 also and some of the other local channels are coming in much weaker on the Dish receiver. If I use the tuner in the tv without Dish it works fine. I did a rescan but did not delete all of the channels first, will try that tonight but don't hold out much hope.