I had thought that one possible outcome of the interview with him would be a decision to not arrest him. If that's the case it seems they'd want to get the interview out of the way by any means, and then if the need to arrest him stands, deal with that then.
B. Because the Ecuadorian government required guarantees the Swedish government cannot provide (because it'd be overriding the judiciary).
Interesting, I don't remember that bit, but that sounds likely. Oh well... what can ya do? shrug