I have now tried 3 KU only lnb's so far, universal, standard, (which both work perfectly, universal is actually more stable) and a bandstacked Dish FSS lnb, which lnb by the way only seems to find horizontal transponders, and not vertical. I'm not sure why as of yet.
The Dish FSS Bandstacked lnb is pointed on Sat 83w Ku AMC9 (dish is fixed for now). This is the first time I used it, so perhaps it's part bad, I'm not sure, but it worked to pick up one signal...) I tried setting lo to "13850" and scanned V side, nothing found. I then tried "Stacked (10750/13850)" then just "10750" all by itself, and set to scan both V and H. It only picked up the same feed each time ("AMC9-embedded" which is a news feed). The lnb is mounted to the original Primestar 1 meter feedhorn (looks like a Dalek eyestalk, kinda, lol.) and dish, and it couldn't find anything except that "amc9-embedded" horizontal transponder feed. It did pick up "quality" on some of the transponders though. I have confirmed with Tron that I have the FSS lnb mounted properly to the Primestar feedhorn. The universal and standard lnbs pick up Pbj, Rtv, Tuff, and a couple other feeds on this same sat.
<<< That's the feedhorn, borrowed pic from "Duster014". Mine is mounted to the FSS lnb. I have 1 more Dish FSS lnb, and I'll try that one also. Hopefully some other people here can try this combo, and see if it works for them.