Dual display not working with Dell E-Port Plus Advanced Port Replicator with USB 3.0 - E7450

Here is my situation,

I own a Lattitude E7450, and needed to connected two displays to it. I went ahead and bought the Dell E-Port Plus Advanced Port Replicator with USB 3.0, since it has 2 DVI ports on the back. It shows it is compatible with my laptop.

I set up my dock, connected my laptop, as well as both external monitors. Only one monitor shows a duplicated desktop. When I go into the display settings, I cannot see any existence of another external display being connected.

All of my drivers are up to date, restarted laptop many times. Pretty bummed out.

Anyone have any solution/knowledge to this?