@Stephanie94,
Looking at your listings makes me homesick, and your place is very inviting. It looks like you offer the same place in either a 1 bedroom or 2 bedroom configuration. You may know this already, but do you have the calendars for both listings linked to each other? When a reservation is made, the same dates on the calendar of the linked listing are instantaneously blocked.
https://www.airbnb.com/help/article/1864/linking-calendars-for-multiple-listings
This is different than the calendar syncing feature that is used when connecting to calendars on other platforms. https://www.airbnb.com/help/article/99/syncing-your-airbnb-calendar-with-other-calendars. This function usually updates calendars on a schedule, e.g. every 2, 4 or 6 hours. Which leaves windows where the connected calendar will show availability, and can be booked. This is unique to Airbnb, because other platforms don't allow syncing between calendars on their platform.
Please note that the calendar linking feature is limited to just blocking the calendars between the primary calendar and secondary listings that are linked directly to the primary. For example, a house has four bedrooms, and the host wants to list it with four different configurations depending upon the number of bedrooms that will be rented. The primary listing is for the four bedrooms, and the secondary listings are for 1 bedroom, 2 bedrooms or 3 bedrooms, respectively. Each of the secondary calendars is directly linked to the 4 bedroom primary listing. Whenever the 4 bedroom listing is booked, it will block the all of secondary listings' calendars. However, if 2 bedrooms are booked, it will only block the calendar of the 4 bedroom primary listing, and will not block the calendars of the 1 bedroom and 3 bedroom listings.