Guest instant booked on Airbnb for 21 nights despite my 28-night minimum. How?

Hi there. So, I am fairly new to using API, so I'm not sure where the error is occurring.

My city just basically eliminated my short-term rental, along with 121 others. As of January 1, I cannot rent for less than 28 nights. I changed the minimum nights at the property level, and have the preference for my listings using the property rules.

Nevertheless, a guest just instant booked for 21 nights on Airbnb next September. How?

Can someone tell me what I should check?

I see that you did change the base rules for your property - but it's being overridden by the min-nights settings of your Seasons:

https://app.ownerrez.com/seasons

Always check Tools > Rate Calendar - it will show what actual rates and min-nights are being pushed after all the various settings are considered each in turn.

BTW, I notice a few other suggestions in your account, if you want to write in to the Helpdesk for a review.

Thanks, Ken, I will.