You are lucky you were not banned. That Rule has always been in place, and is pretty straightforward. You actually have to scroll through the list of rules before submitting a review. So no excuse.
Rule # 11 under 'Review submission guidelines':
'Reviews cannot be submitted by the provider (self review) or submitted by anyone directly related to the provider (husband, brother, roommate, other provider, etc). Review cannot be submitted from the provider's computer. The profile will be delisted if caught.'