I had my old profile since March 2015 with score 417 (NOC 2173, IELTS overall band 9), but didn't get any PT from Ontario. So I deleted and recreated the profile on 14th Oct again and got the PT on 16th Oct.
Basically, I don't have any idea about their algorithm of selecting the profile, but based on my experience at atleast, I can say it can work. I don't suggest anything, but I feel is that in addition to the score (>400), they also have another check that profiles created after June 2015 are only considered while ranking. There was a post here somewhere (cannot find now) which had a link from Ontario PNP mentioning that they can read profile only created after June 2015.
So not sure, if some one can check the link and confirm....