Weird export/auto normalizing issue

Hey everyone,

I’m running Cubase 6.5.5 ( 64bits - Win 8 - Intel i5 - 24Gb ) and have been having the following issue on several of my (quite big) projects :

Whenever I want to do a Channel Batch Export of midi/VST tracks, several tracks end up being normalized ( or even badly clipping )

Now if I do a simple “stereo output” export for each track individually, the problem doesn’t happen !
But I obviously can’t spend the time to do that when I have dozens of tracks to export…

I’ve recently downloaded the Cubase 8 trial and the problem’s still happening, so I guess it comes from the project itself !

Any ideas ?