Ok, I've tried to explain this before, but the SW64(or SW44) will not work with the 500Twin, UNLESS you put it into the same numbered input, sat 1a&1b. And even then, it may not wotk. I have never tried to do it that way. You MUST have 2 feeds to each LNB because the SW64 line locks the voltages to get either the even or odd transponders. Now, I would say that the reason it sent down both the even and odd trans when all you did was hook the 61.5 to it is because you were only using 1 location, so the SW64 was just kinda passed through and not used. I'm willing to bet that if you replace your Twin with 2 duals, and hook at least 1 more sat up, it will only show the one set. I realize that I had said I was going to try to do some more testing, and I apologize. I just haven't had time. My main concern is that the switch logic for the legacy system will not support more than 4 sats. I have a plan I will try when I get the time. What you could try is to put the SW21 with the Twin and the SW64(make sure you are using both lines from the 61.5), and try swapping them back and forth. I'm willing to bet that the switch on the #2 sat port will not be seen, and it will only pass through what is either hookup up on sat 1, or the only sat that is hooked into it. Mike encountered a cimilar problem with the DP setup. If having 5 sats is a nedd, then you may need a DP+44 and a DP receiver to do it.