Something weird happened with W50DR in La Crosse this morning, at least as my tuner reacted to it. My tuner is a ChannelMaster CM-7000PAL DVR.
10.1 and 10.2 were both there, but it took my tuner a very long time to "resolve" them -- and when the picture did finally show up there was no sound.
Meanwhile my tuner found two new duplicate channels to these, mapping to 70.1 and 70.2, complete with sound.
As it turned out, deleting all four channels, then re-scanning for new channels, cleared everything up.
Whatever hiccup happened with W50DR maybe most tuners can handle more gracefully than mine, I don't know. Unless of course my DVR screwed up entirely on its own!