Thanks for responding!
Regards #1, CJT Plugin is not prevent saving block/box even if it contain errors! CJT doesn't do that! You can save anything you wrote inside CJT code block/box! If you like to get the syntax highlighter validate your CSS code that contain the CSS declaration. Please select 'HTML' editor language instead of CSS from the editor languages popup icon!
Regards #2, Please don't split your code like that as this going to confuse you in the future! CJT is developed to help you keeping your code organized.
Hope that helps.
Please let me know what happened!