Date format for calendar link not working

When I click the widget calendar link to December 7, 2012, the link that is generated is:
https://www.revenuegrowthclub.com/members/2012/12/07/

Instead of going to that url, it gets automatically redirected to the home page:
https://www.revenuegrowthclub.com/members/

The url that does work to show the posts for that day is:
https://www.revenuegrowthclub.com/members/2012/12/7/

So the date has changed from “07” to “7” without the zero. However, the calendar will not link to that url, and it’s a different format from all the other calendar days.

All the other date links from the calendar that I have tried work, including other single-digit days.

A little background: I have been attempting to get password protection on the blog posts so it will be a membership site. I have tried three member access/privacy plugins, to no avail. Finally, none of the posts would come up under any circumstances. This problem persisted even after all the member access/privacy plugins were disabled. Resetting permalinks solved the problem *except* for this one calendar link.

Any suggestions for making the posts come up at https://www.revenuegrowthclub.com/members/2012/12/07/ ?