Yeah I'm sure he didn't and doesn't want to have to activate his own buy-out. It would be much easier for him if RS just accepted the money from us.
Also, I'm sure there would be some tax implications for him and therefore by extension, us, which will make the whole thing more expensive. Which is another reason why RS might be wanting to take this route, ie, we pay the amount over the release that would need to be paid in tax directly to RS. Either way, this makes the whole thing far more complicated.