Just checking in.
I went down to immigration today to apply and it worked! The points are indeed retroactive.
I had a valid application (composed of about 15 docs for application and about 5 for the points).
Before you can actually apply, your application gets checked to make sure you fulfill the base requirements. I had 1 check for the overall application and another counter checked to make sure that my points were valid.
I then waited 4 hours to submit my application, which was Hanko'd all over the place.
However, just because my application is valid, does not mean my request will he granted. I should find out the response within 4 months.