See if they have the same bios version # in the first tab.
Crossfire only works in full screen. You can get fraps or use msi afterburner for its monitoring functions.
You can setup whats montiroed and what is shown on a OSD-on screen display.
Might take you a while to figure out the options, but it will help.
I have it show
gpu1 , temp load %
gpu2 , temp load %