Yeah and crossfire will work on games that don't support it, but it will work badly, performing worse then a single card running. You have to turn it off manually before playing a game that does not support it. Anyway, uninstall the cards, then run driver cleaner to make sure the video drivers are wiped completely. Take them out, reseat them and the Crossfire bridge. Boot up and reinstall Catalyst, then install the Catalyst Application Profiles. Restart, make sure crossfire is enabled. Then run a few test like Dirt 2's benchmark, 3D Mark Vantage or 2k11, and run fraps while doing a few game sessions of games known to work in Crossfire. Make sure to record your results in the Fraps log during the game sessions. F11 should do it during gameplay, and you can check the Frapslog in Fraps install folder.
Now repeat all the above, but with Crossfire disabled. On the game sessions, make sure to try to play the exact same areas you played before. Also, don't have Fraps record the fps to its log until normal gameplay begins. Story scenes and loading screens fps will mess with the results otherwise. When you have done everything, compare all the results. When you are doing this, be sure to run the games maxed out as much as possible, at the highest res you can run on your monitor.
Oh yeah, and if the card is just showing up as idle/zero in the AMD Overdrive section of CCC on your second card, that could just be a fluke. If everything is working fine in gameplay, then just ignore it.