You can edit or delete items from the cart and if not, that's a defective site so you move on. If it thinks you had it before, it's just code and if any glitch bothers you, don't shop there.
I clicked on an item from a clothing store and it said i had added it to my shopping cart over 2 months ago, but i had never even been to the site before, and my cart (which i never had) was empty. I have no credit cards and my bank account is closed to the internet. It looks like a glitch to me, but im not sure...please help