UGUI Scaling across multiple monitors

I am having trouble getting two different UGUI canvases to scale properly across multiple displays. In our application we have a small touchscreen display which runs at 1280x800 and a large tv which runs at 1080p. I have a scene setup with two cameras and two canvases and each camera AND canvas has the proper Target Display set in the inspector. The only script that runs is in the startup and all it does is activate the second display. When I build and run each display initializes properly at the correct resolution, and even displays the correct canvas. The problem is, that both canvases are scaled to the size of the primary monitor rather than each canvas scaling to the size of the monitor each is displayed on.

Does anyone have a workaround for this?

• I have tried on Unity 5.3.6f1 and Unity 5.4.0f2 with no luck

• I have tried with and without -multidisplay command line argument

• Here is an imgur gallery with pictures of the relevant inspector windows: http://imgur.com/a/BQW9R