To add to Thomas's reply...
The WP also backs off in resolution and frame rate if there's a bottle neck in ur system.
Add to that it also not recognised correctly with certain softwares...
So it could be ur actually only streaming a 360 or 480 Res.
IMO the WP still isn't "pro" ready, and far too buggy.
Grab yourself a magewell or Aja U-tap.
Better still purchase a dedicated hardware streamer that doesn't rely on a PC and software.