@Alison27 - it looks like you might have Smart Pricing turned on. I am getting variable prices when looking at your listing for "Life's a Beach Plettenburg Bay". There is a 5% weekly discount and 48% monthly discount
"Play Live Relax" looks like you are offering a 50% monthly discount and I could book no less than 2 months at a time.
"Rock's Edge" looks like it's always $88USD and there is a 15% weekly discount with a 48% monthly discount.
If you weren't expecting those numbers, you might want to review your pricing on each one.
https://www.airbnb.com/help/article/1168/how-do-i-turn-smart-pricing-on-or-off