If you stay across reservation cycles, the stay count will be calculated within each cycle. For example, if the reservation cycle is from the 9th of each month to the 8th of the following month and you stay for 3 nights starting from 9/8, the count will be as follows. (The stay is counted based on the check-in date.)
Stay on 9/8: Counted as 1 night in the previous cycle.
Stays on 9/9 and 9/10: Counted as 2 nights in the next cycle.