Matchmaking - Unable to force regions

As I understand it, when the Network Manager's "Matchmaker Host URI" is set to its default "mm.unet.unity3d.com", the matchmaker finds games that are in the region closest to the player.

According to the SetMatchHost documentation and this thread, I should be able to override this and force the region by doing something like the following command prior to getting a list of games:

Code (csharp):

1. myNetworkManager.SetMatchHost("eu1-mm.unet.unity3d.com", myNetworkManager.matchPort, true);

While this appears to be changing the Network Manager's Matchmaker Host URI, it doesn't actually affect the list of games I'm receiving. Whether I'm using US, EU or AP, I see the same exact list.

Is there a step here I'm missing, maybe?