You are supposed to use the default 118.7 port for peaking. 2nd best is the 119, I think, to peak. I've seen the Dish literature but I can't clearly recall the order after the preferred 118.7 peak.
To be clear: the default outputs are per sat for peaking purposes only before any of the ports are connected to any other equipment. Then upon completion of installation, each output port will provide all 3 sats (or 4 sats using the bracket to attache a single DP LNBF for 129 whose output is connected to the input port of the DPP 500+) to directly connected single or dual tuner boxes or to Single or Duo Nodes for Hopper installations. Each port can support up to ONE dual tuner box (or Hopper).
IMPORTANT: The DPP44 is currently the ONLY external switch this LNBF can recognize. So, if you need more feeds, you must use the DPP44. When this LNBF is connected to a DPP44, the INTERNAL switch in the LNBF will shut OFF, allowing the DPP44 to do the switching.