Tomorrow is the last day for booking Off Peak rates to get the 40% off of standard rates. I looked for something here that could explain how the points work out but didn't see anything. this is what I think

Book off peak at 9,000 points. The standard rate is 12,500 points. Minus the 40% is (-5,000) 7,500 per night. So a 5 night stay would equal 30,000 points (4x7,500 + 1 free night)

Right now the website takes 36,000 (4x9,000).so I should expect to be reimbursed 6,000 points after my stay. Does anyone else see the math this way?