Dish 811 or local station problem?

[mdl23]

I live in the Dallas Fort worth area. I have an OTA antenna connected to my Dish 811 and 2 days ago the local NBC channel which is channel 5 on the analog channel system switched on my EPG to the digital channel which is 41-1. I re-scanned the NBC individually and re-scanned for all channels. I even re-booted the receiver but the epg still shows the digital channel. Is this a station issue or my receiver?