Well the T&C's say it should be qualifying: (
http://www.ichotelsgroup.com/h/d/pc/...te/lowfaq.html)
"Are Priority Club points awarded for bookings that qualify for the Lowest Internet Rate Guarantee?"
Yes. Priority Club points will be awarded to Priority Club Rewards members, based on the rate actually paid at check-out. Points are not awarded if the reservation is canceled.
PC Customer Service should be able to fix any discrepancy...