Checkout Page Redirecting - Slug Bug

I had an issue I wanted to make you aware of. We had several posts with slugs containing the word cartoon. This overrides the shopping cart link regardless of what slug you choose in the presentation settings. Once I changed the slugs containing cart% the checkout page came up fine. Is there a work around for this? We will be having a network of people adding content. I would hate for another slug to interfere with the shopping cart. I appreciate any help. Thanks!