We have three stores within Magento EE. When the site was set-up, inventory was dumped into "All Store Views" versus in each individual store. Having said that, some inventory is sold across all three sites, and all three sites share the same user login and checkout process. But what happens now is, if you add a store-specific item to your cart (from Store A), then head over to one of the other two sites' shopping carts (Store B or C) and click the product link, it essentially replicates the product page (from A) on the (Store B or C) domain. The URL path is the same, and all on-page content is exactly the same.
Does this issue stem from all inventory being under All Stores? Or can this be fix, so if you have an item from Store A in your Store B shopping cart, that the link points back to its origin in Store A?