I may be missing something, but this doesn't make any sense to me. It shouldn't matter at all what channels you have saved. Deleting a channel shouldn't affect anything.
The only thing I can figure is that on some receivers it COULD make a difference with respect to if you actually tune in Video 1 before trying the RTN channel. I've seen situations on one of my receivers whereby when there are several nearby narrow channels where to get to a channel, it would depend upon which direction I was coming from, like if I was tuning the channels at lower freq, I'd either skip over the desired channel or end up on the same one I was just on, but if I was tuned to the next higher freq, I could access the desired channel.
Once locked on the desired freq though, I can't imagine why it would matter what direction you came from and absolutely there should be no affect on quality caused by whether you have another channel like Video 1 saved. So I don't understand what's causing the things you're observing.
This whole discussion though does remind me of something I did MANY years ago, when I lived in a big city suburban condominium (boy I'm glad I don't have to live in one of those anymore). Well I had this neighbor, who lived in the unit below, who would play their FM radio VERY LOUD, VERY LATE into the night, and it drove me crazy. Well being an electronics hobbiest, I had a cheap heathkit signal generator, and I found that if I generated a frequency just a little bit above the channel they were listening to into a short antenna wire, and slowly turned up the signal strength on the generator, that as I turned up the level, the volume on the neighbor's radio would go down. Ie what apparently was happening (although there are other possibilities), was that the radio had automatic frequency control that locked onto the channel, but I was basically pulling the radio off frequency little by little. But what I'd do was slowly turn up my generator, until the volume on the radio was at a respectable level, but then the neighbor would get up and turn the volume up... then I'd turn it down by increasing the level on my generator... then the neighbor would turn it up, to virtually full volume.... THEN, I'd turn my generator OFF, and the radio would be so loud you could hear it a mile away, and the neighbor would get fed up and turn it off.
One time, after I hadn't heard them play the radio for several weeks, we went through the game again, at which point I heard "I THOUGHT YOU GOT THIS THING FIXED!" followed by CRASH {apparently the radio being thrown against the wall}. Being a ham, I'm not proud of intentionally generating harmful interferrence, however the levels being generated were actually extremely low, and it gave me at least a little bit of satisfaction during a frustrating period of living next to some really terrible neighbors.
However the above story I think relates to this RTN thing, because that LEO signal is kind of like my remote volume control, in that some receivers tend to get pulled over to that signal via some AFC effect. But it shouldn't matter whether the channels is SAVED or not.
