Limiting Dates not working correctly

On our Volunteer Request form (https://form.jotform.com/60188003849963), we would like to disable Sundays and Mondays when we are not open. The limit dates feature worked appropriately for several months to disable these dates, but within the past 2 weeks, the form has been allowing people to select these days of the week that we have filtered out. Additionally, the "calendar pop-up" had not been functioning on our Volunteer Date field (although we also have that set up to pop-up in the properties). 

How can we fix these issues? 

Hello ntfbweb,

I did check your form and I am able to replicate the issue you are having. Date calendar field does not display the pop-up window to select dates. The issue seems to be caused because of the additional line break you have added in the "Disable Date Ranges" of limit dates. Please check the screenshot below:

I removed the additional line and that seems to have fixed this issue. I would suggest you to please test your form again and get back to us if the issue persists.

Thank you!