There are a couple of reasons why the pricing of a round may be different from what you were expecting.
The Tariff has changed due to Summer/Winter pricing becoming active
All courses run a Winter and Summer tariff, both of which can be seen in the club's Points Matrix. Winter runs from October to March, and Summer runs from April to September. If you're booking around these transition times, you may notice a difference in points.
The Club has adjusted its pricing
Part of the terms of the membership is clubs are able to adjust pricing at regular intervals in order to balance availability of the course. This can mean altering up or down the points value of slots. Regardless of whether the pricing has changed, all bookings are covered by the PlayMoreGolf Points Guarantee.