Well, the TGB article is sort of accurate.If the station actually moved, then you can go through the process of adding the channel without deleting the line in the xml file. Then you can hide the channel that doesn't work, or uncheck it in the signal strength part. One thing you can't fix is if the station has a problem in their information as they send it out your media center will ignore it. This happened more in the past when station engineers didn't know what they were doing with the signal. A local station here in central IA once broadcast their signal as channel 59 on UHF-59. They were supposed to be sending 5-1 on UHF-59. This broke the media center and one had to add 59-1 on 59 to get that to work. It was sort of a similar problem except the media center saw full signal but didn't show anything since it couldn't find a stream for 5-1.
Now here is what I would do.
From TGB post with modifications by me to help you out:
1. Start Media Center
2. Select settings from main menu
3. Select TV
4. Select Guide
5. Select Add Missing Channels
6. Select Add DTV Channel
7. Enter the Major number of 10 (or substitute your station here) and the minor number of 1 should be automatically entered.
8. Select Next
9. Enter assigned frequency of 10 (substitute your frequency here - google for it, but i suggest http://www.tvfool.com/
10. Select Next
11. Select Finish
12. Select Done
13. Select Back on your Remote
14. Select Digital TV Antenna Signal Strength (if you have scheduled recordings, answer YES)
15. Here is where I would uncheck your non-working channel 10, but leave the one you added(for this reason I usually add it with a non-caps name)
16. Watch the channel checks as they scroll by and you should now have a signal from WDIO-DT
Lastly you'll need to edit the listings for the channel you added manually and tell it to use the old WDIO-DT's listings for the Guide, and help Trip out by catching some info if you're using 32-bit Vista. Its easy and only takes a few minutes.