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Forum Moderators: buckworks
Right now customers go outside your site when they add something to the cart or checking out. That alone could explain the high bounce rate with the cart.
In terms of SEO you're having problems with the meta-tags on category pages and lack of page focus.
And get rid of the admin link which displays on your catalog front end.
However, you will still have to go outside the site when you wish to check out. Would that be better?