"Exceptional NON working days" not displaying on calendar

We have a multisite setup under the homeisjchart.com network. Most of the sites are using the Appointments+ plugin to manage appointments on pages like http://homeisoneonesix.com/tour/ and http://homeisnorthhaven.com/tour/.

We're trying to add exclusions for holidays like Labor Day and Thanksgiving. We can add the exceptions and see that they get saved in the settings (HomeIsNorthHaven settings - https://www.dropbox.com/s/1nnmfy4d5b1ux6p/Screenshot%202016-09-02%2016.44.47.png?dl=0), but the date isn't showing up as "Not possible" on the front end of the site. All of these dates are still showing as available for booking.

Can you please take a look and let us know what we need to do to get this fixed?

Thank you!