I had been trying to figure this out all weekend. The number seem off, but I just had TOS find some spreads. It is their numbers. Most examples I have found of diagonals are similar to your methods. Buy long term, sell short term.
I was trying to find some more ideas for spreads. I don't know why, but TOS seems very adamant about selling the longer term one. Every diagonal that came up is this same way. This thing is not serving a purpose at the moment...