I think one reason for their odd rankings is that its a joint list that they have to comprise on.
There's been a few they completely disagree on, so end up compromising. That's the problem with two people trying to compile a rankings list though. I do enjoy their chemistry though. Both positively and negatively, you can tell they're married 😉
I couldn't even start ranking episodes like that, so fair play to them for giving it a bash. I don't necessarily agree with all their rankings, but I really enjoy their podcast because they look in depth at the story and the writing and I don't think any other Buffy podcast does that in such detail. It always gives me personally a fresh perspective on certain plot points. Pretty much every time I listen to one of their podcasts, I walk away with an "oh yeah!" feeling.
@Mr Trick That's quite cool you got an email from Lani Diane Rich! 🙂