I found that one hard to get my head around and still do. Checkout my post #6 above...where I pointed out that I needed to be in the country for 10 days after the advanced wedding ceremony.....thats what Andy is referring to.
Like I said, I did it in 2 1/2 weeks comfortably, including flight time.....if you can get the CNI exchanged at the embassy in a day (which I couldnt at the time) then you will need one less day.