Booking.com availability question

Booking . com question. I have 100 days out set on API settings on a channel. But BDC keeps sending me emails that I only have few dates left open. When I log in and view calendar, it says:
Act now – your property is only available for 23 more days  I am not sure how is that possible when by API channel says 100 days.

This is a known issue that can be ignored.

https://www.ownerrez.com/support/articles/channel-management-api-integrations-bookingcom-common-issues-questions#only-available-messages

Thank you