You're welcome! One more thing:
To go back to your initial reply, you said "It does not really matter much" whether the resulting bounce comes out as stereo or mono. I'm inclined to agree as the resulting file pans as I would expect from a mono file.
You shouldn't expect a mono file to be panned unless you pan it voluntarily in your mixer upon playback: a mono file yields a single audio signal, so if you place it on a mono track with the pan knob set to center, you'll send that single audio signal to both speakers in equal amounts, and the sound will be perceived as coming from the center of the stereo field.
So by default a mono file is always going to come out from the center.
On the other hand, by default, a stereo file may already be panned since it will yield two audio signals, one for the left speaker and the other for the right speaker, and those signals may be different (and/or have different levels).