Project Details: Clicking on a date doesn't close the calendar

Projects: Project Settings:  Start/Due/Closed Dates.

Clicking a date on the Start Date calendar leaves the calendar up, you have to press tab, which then takes you to the next item (Due Date).  You put in a due date which is fine, but the calendar doesn't close and if you click Tab it will go into the 'Closed Date' field.  I don't want a closed date since the project is still open, but now that I have tabbed into the field it is autofilling it to today and not allowing me to delete the date.