Why is it so hard to book a camp site?

I'm trying to book a campsite for this weekend ie early Feb. If I use the club app on my iphone or ipad most of the search criteria is missing from the screen. The functionality is all there when I use my computer but when I enter the start and finish dates and press search I get lots of results but when I open each one it turns out that they are not actually open in February. This is so frustrating - has anyone else found this problem or am I doing something wrong? What's the point of entering a date range if the system ignores it in the search results?

Moderator Comment - Please use the link provided below to the main thread on the new booking system, thanks