I think Dish originally put KODF in their lineup when it was DFW's (analog) Azteca America affiliate. Azteca has moved around a couple of times since then and is now on KAZD/55. I presume 55 is still available on Dish.
For some time after KODF went digital they were a Mega TV affiliate. That's probably why Dish kept them around, but Mega is no longer available in DFW. KODF has since fallen on hard times and is currently simulcasting Hot TV (with 31.3 and 50.4), as well as the Manuel Solis infomercials (with 28.2).
I'm disappointed if this means Hot TV isn't available on Dish Network anymore. Yet another reason to keep an old-fashioned TV antenna hooked up.