Emulator

You will require multiple controllers to reproduce this

What steps will reproduce the problem?

1. Open up the config. For each Controller tab, set the "Controller"
   dropdown to the first controller in the list, and hit OK.
2. Open up the config again, and configure your controller tabs. You'll
   notice that you'll be able to use your first controller to configure all
   Controller tabs, which is expected.
3. Now, on any tab, change your "Controller" dropdown to your second
   device, and try using input on this second device to configure your
   controllers. It will not work
4. Without altering this dropdown (leave it on the 2nd controller), press
   OK and return to the tab where you set it to controller #2. You will
   notice it now accepts input from your second controller.

What is the expected output? What do you see instead?
When altering the Controller from the dropdown, the accepted input should
change immediately, not after hitting OK.

What version of the product are you using? On what operating system?
Windows 7 64-bit, R3883

Please provide any additional information below.
When i discovered this, i had 4 controllers attached, but it should work
with any number of controllers greater than 1.