UPDATE
I\'m certain this is a Visual Studio bug with no obvious solution. I\'ve encountered a number of people who have the same exact issue. I ha
There are two instances of the site FrontEnd running of course, but notice that one instance is HTTP and the other HTTPS.
It's possible to get two instances when SSL Enabled is set to True in the web site properties but the Project Url on the Web tab is set to an HTTP address.
Make them both HTTP (or HTTPS) and that might fix it.