I was going to leave this alone until I saw your second photo/diagram and read what you outlined above, see the statement in red.I am not combining two mono signals. You simply adjust the software back to stereo
I am here to tell you that once you send out a Mono Signal from Rockit through the Behringer, there is no way you can return it to a Stereo, Period. Unless you are making a NEW recording and mixdown. So yes, you are combing the same two Mono Signals coming in.
Don't believe me? Get one of those CDs that come as a Lens Cleaner that has the Audio separation Test on it. Then Play it through Rockit and you will hear the same thing coming out of both speakers the way you have it configured.
Another way to tell is to make your own stereo recording using one mic at a time for one channel at a time. Say "One Left" on the left channel and then "Two Right" on the Right channel then do a playback and see if there is separation back to left and right as you recorded it. BTW I did get a second opinion on this before posting. Just want to set the record straight. A left and right out does not always mean stereo out.