I am not sure which Grid you are using and how you set things up. But if you kept the code of the wp-index.php file you can go to X > Theme Options > Layout and Design and set proper stuff.
I suggest that you consider an easier way to add a grid to your website and that is The Grid and Essential Grid plugins.
If you want to continue the customization you need to give more detailed information on what you do and give us the URL/User/Pass of your website using Secure Note. Thank you.