Looks like a fun cage set up Jesse
Some of the images didn't load all the way? they seemed to be partially cut off? I don't know if its just my computer or something went wrong when you uploaded them?
I'm sure the extra space is what helps keep them from having any arguments. After reading peoples experience with fighting dwarf hamsters I'm pretty certain its in most cases due to lack of space.
I'm not experienced to tell if a robo ham is pregnant to just look at it. Are your parents helping you out with breeding the hamsters Jesse?