If I have the name of an item as, "Item One", the url is something like //p-320-511-item-one.aspx. If I change it to, "Item One Super Deluxe", it changes the URL to //p-320-511-item-one-super-deluxe.aspx.
After that change, the old URL still works.
My question is, where is the old url stored in the database? It must keep track of old urls in a table somewhere that point back to the current one....