Not quite. Ecuador made the offer to Sweden to interview Assange in the embassy as early as 2012. The Swedish prosecutor did nothing until March this year when she was prompted to do something by higher ups due to the statute of limitations. Sweden then made the formal request in June which led to what you describe.

If Sweden was serious about getting this sorted out then they could have done so years ago. Instead they've been unusually inflexible about the whole affair which makes the whole thing smell even more than it did at the beginning.