When you say you saw 36 MHz wide tpns from SW1/SW2 on a spectrum analyzer, were they using 36 MHz of a 62.5 MHz slot like HoTat2 suggests, or were they spaced the same as other Ka tpns? According to the FCC filings, the 8 62.5 MHz tpns in the Spaceway sats are contiguous, which sounds to me like they could create the same output as Directv's normal Ka sats.
The Ka mapping has a 12 MHz guard band at the start of a 500 MHz block, then a 36 Mhz tpn, then a 4 MHz guard, then a 36 MHz tpn, and so on with another 12 MHz guard at the end of a 500 MHz block. So SW1's first 62.5 MHz tpn could have data from 12-48 MHz and 52-62.5 MHz, and the next tpn has data from 0 to 25.5 MHz and 29.5-62.5 MHz, the next from 0-3 MHz, 7-43 MHz and 47-62.5 MHz, and so on...
But it doesn't appear to work this way, despite the FCC filing suggesting it might, because if you look at the TPN map, you see 103 has 4 Ka hi tpns from SW1 and 16 Ka hi CONUS tpns from D12. That's kind of what I'd expect if those 4 SW1 tpns (2 per polarity) were using only 36 MHz of the 62.5 MHz available. This would take up the first eight (4 per polarity) slots when using the normal Ka mapping. Otherwise, there would be room for 4 more spots from SW1 or 4 more CONUS tpns from D12.
If the Spaceway sats are being "wasteful" with spectrum by using only 36 MHz out of 62.5 MHz, I wonder if D14 will take over SW2's spots and SW2 be relegated to spare or internal-only duty? Otherwise the six SW2 spots shown will leave only 14 Ka hi CONUS tpn slots available for D14 to use.