Hello, I am LA DMA, as well and know exactly what you are talking about, and I agree it is now annoying to no longer have the info for This TV that has now been moved to 5.3. Once again, my TiVo Series 3 has all the program info at 5.3 for This and even 5.2 (in the future display) for the new Antenna TV at 5.2. Ironically, these two channels will have a few programs I would record to watch later, as I have done with This TV a few times in the past, so the guide for both of them becomes critical.
Non of the CSR's are really going to be able to help you with this. I think our best chance is with the tech department. You can try an email to them (I forgot the email address) or calling them on the phone and see if you get anyone who knows what you are talking about.
Dish really should be much better at making these changes and monitoring the multiplex channels issues. I have to be fair and say that they have added a lot of guide info for several channels in the LA DMA since, but there are still an alarming number of other multi-plexed channels that are still "Digital Service" only. What really hurts is that TiVo is really good about this and keeps up with the changes within a day or two, very fast and impressive. Certainly Dish could do at least as well as TiVo on this matter. We can only hope.