Hi:
Working with one of my projects, pushed the "Publish to Gallery" button by mistake, and the project become public, even when I don´t wanted to.
I entered to gallery to erase it, and found out that another of my projects was there!
Both projects are apps that I published in Google Play, so that's why I don't want to sent them to gallery.
I highly recommend to add a confirmation pop-up or something like that, when you push the "Publish to Gallery" button, to confirm that is your desire to publish your project, to avoid the situation that happened to me.
Regards.