The viv really isn't big enough...
beardies should really have about 8 square feet of floorspace..... so 4ft x 3ft would be a good size..
Also, i would really recommend separating them. If you dont have the room for two vivs, I'd get rid of one

. Even females can, and will, fight. There are also dominance issues, which may affect feeding.
Also, get your beardies off that substrate straight away. They easily swallow wood chippings, which leads to impaction. which WILL kill them.
Warning, graphic image! <---- this is what will happen to your pets if you keep them on the wood.
The best substrate is kitchen towels. However, if you think this looks crappy (which it does, but hey - your beardies wont die), then you can tile the floor with some rough, natural looking tiles (better for them to be rough or your beardies will slide everywhere) or even secure some Astroturf down.
What temperatures do you keep them at? Do you use a UV bulb?
