Thank you, Tateu! I'm not sure you realize how important this plugin is to so many people
I'm delighted to see any development whatsoever!!
Interestingly, with the previous QTInput release I'm using (circa 2008), this mixdown behavior isn't what I typically see. Most of my sources have between 2 and 8 mono PCM channels (plus ProRes or Photo JPEG video), and they all return the correct number of channels. Does the mixdown you speak of only apply to very high channel counts - i.e. ~10 tracks?
Derek