Hello, I have just installed Zen for the first time. It looks very promising. I put in a banner "logo" at the top and am trying to center it on the page. I followed all directions for changing the stylesheet.css but the banner stays positioned to the left. Also, in my browser, I notice that the "Home" strip is covering up some lettering (of which I can't read). Not sure how I managed this! The stylesheet.css is located in a directory named vintage. Thank you if you can help me.

products/includes/templates/vintage

The URL is http://collectingvintage.com/products/