Go into Seller Admin > Cart Shipping Settings and make sure you select Shipping Origin: United States, then click Next to save changes, then you can click Back to Admin and test your cart again to see if that fixed things.
If that doesn't fix it, then I would suggest removing the Handling charge, then delete the three Rules and set them up again with a Flat rate amount of 4.00. Handling doesn't show up as a separate amount in the cart; it just gets added to the overall Shipping total, so this would work out the same as having Handling = 4.00 with Flat rates = 0.00.