Strawberry mom, it appears you have half a clue..
From the newegg shipping FAQ:
Is shipping added cumulatively for each item I order or does shipping reduce when you purchase multiple items?
When you order multiple items, most of the time the shipping is reduced in your shopping cart, according to weight and size, safety and insurance required. Just place all items in the shopping cart, pick your state and method of shipping and hit the shipping calculator. You will see the reduction if it applies. On certain items, due to significant shipping discounts offered by Newegg on the item, the shipping will add cumulatively, unless multiple items are purchased. Shipping charge is always per the website.
So sometimes they DONT reduce the shipping. But I suspect that in most cases they do.
Please engage brain before opening mouth.