Bluemix troubleshooting -> The domain names for different applications are the same

You might notice that several applications share the same URL in Bluemix.

This problem might happen when you assign the same URL route for different applications within a space.
For example, you push the myApp1 application to Bluemix and set the domain to "mynewapp.mybluemix.net". Then, you push another myApp2 application to the same space and set one of its URL routes to "mynewapp.mybluemix.net". The route is now mapped to both applications.

This is the supported behavior of the Bluemix and you can use this practice to achieve zero downtime for your application upgrade. For more information, see Blue-Green deployments.