NextGEN Gallery ColorBoxer definitely targets both WordPress posts and pages (as long as they contain a NextGEN shortcode), so I'm not sure why you were experiencing this.
Since you've switched to another plugin now, I'm not really able to troubleshoot any conflicts in your source that may have arisen. I do wonder, however, if you've got a custom setup with separate database tables, as both your "Gallery" and "Projects" tabs appear to be pages.
If you'd like to give it another shot, just let me know. I'd be happy to look into this for you.