There is mistake in update of website, not mistake in sending out invites to those who were eligible but didn't receive ITA. What we can only speculate is - IRCC did put cut off as 481, tie breaking rule was say for eg: 25th Sep 2023, but while updating website it was incorrectly mentioned as 25th Nov 2023. The website details needs to be corrected, not the draw itself.
Federal draws are not related to PNPs. Each PNP decides on whom to invite.
OINP always have a point lower than the latest EE draw as their highest score, so however unfortunate, there will be people who miss out on both.