My 811 for the longest time has been hooked up to 110 & 119 through a SW21 (yeah couple old Legacy Duals) and have no issues. Its deactivated but I use it for OTA digital and it gets some freeview channels (like the Starz freeview) 
When I try to hook 129 into the mix it doesn't work through the switch. When I hook the line directly to the box it shows signal on 129 on the screen no problems. But when I hook it to the port on the SW21 where 110 is it shows (this is after running check switch)
1 119 odd
1 119 even
2 X X
2 X X
warning only one satellite connected.
Tried 61.5 & 148 to that same connection on the switch it reads fine. Heck right now it shows
1 119 odd
1 199 even
2 61.5 odd
2 61.5 even
which is what it should do
Does the 811 not like to play with a Legacy dual/Sw21 combo??
I dont have any DP stuff around to try (never believed in it as I always had either a Legacy quad or Twin/sw21 combo when I had Dish)

When I try to hook 129 into the mix it doesn't work through the switch. When I hook the line directly to the box it shows signal on 129 on the screen no problems. But when I hook it to the port on the SW21 where 110 is it shows (this is after running check switch)
1 119 odd
1 119 even
2 X X
2 X X
warning only one satellite connected.
Tried 61.5 & 148 to that same connection on the switch it reads fine. Heck right now it shows
1 119 odd
1 199 even
2 61.5 odd
2 61.5 even
which is what it should do
Does the 811 not like to play with a Legacy dual/Sw21 combo??
I dont have any DP stuff around to try (never believed in it as I always had either a Legacy quad or Twin/sw21 combo when I had Dish)