Please, avoid using Debut beta version (http://www.nchsoftware.com/beta/debutsetup.exe) unless you have a problem with the official one (http://www.nchsoftware.com/capture/index.html). The new drivers are added to the beta version only.
There might be a wrong selection area left in the configuration. Try uninstalling Debut, it will delete all the configuration. Then install Debut again.
I have a feeling that you have tried the official release 1.63, not the beta version. Both of the described problems should be fixed in the beta version.
This bug shows itself when a camera uses RGB mode. It is fixed in the latest beta release. You can try the beta version using the following link: http://www.nchsoftware.com/beta/debutsetup.exe
Debut does not support simultaneous capture from more than one camera. Please, use Eyeline to get pictures from more than one camera at the same moment. It is also possible to rename cameras in Eyeline.