You could try this
Highlight all you tracks in your Collection. Go to the Info Pane (right side of browser). Expand on "Details" (I believe). Enter 0 in the Gain field and click "Apply Changes"
Cross should then keep all your tracks at 0 Gain. This is what I have to do.
If you have a large Collection it may take a couple of minutes to update the Gain field in the track tags.
I hope that helps
