DingDingDing! I think I finally figured it out too,as being improper lnbf skew (I sure do miss my c-band lnb & polarotor,but they just aren't easy to use with these digital receivers)
Tinkered with the lnbf-skew for about an hour and now my ME-tv signal is up from about 72-74 to 86. I knew that it was scanning some of those "skinny signals" in as both H & V, at times, so it had to be the skewer! Biggest trouble for me is, my 10' is on a little rocky peak in backyard, I cannot reach the lnbf when it is aimed at 101W. To tweak it I have to run the dish at least to 123W so I can reach the thing, then run it back up to test my adjustment. I think a 12' step ladder might reach it, but I haven't got a step ladder that tall, lol. Yet. So, all Me-tv'ers-don't give up on getting a stable signal, just takes patience, and a big enough dish that's well adjusted.