USPS Prices HIGH!! Why???

No, 8:0 means to use 8% more weight to the order ...

By coincidence your 8:0 may be appearing to give the amount of extra weight that you are looking for ...

Try a 1lb order ...

Try a 10lb order ...

Try a 100lb order ...

And you will see that between the calculation of the number of boxes and the Tare how the extra weight is added ...

NOTE: boxes round up ...

OK, tried that.

When you go to my site and add one or two items to your cart if you click Estimate shipping should the weight at the top include the tare??

Please tell me what the tare should read for 1 ounce and 1/2 ounce. This is driving me crazy and it's an awfully short drive for me!

The Tare for adding 1 ounce is:
0:.0625

The shipping estimator will not show the Tare on it, and at that small of an amount you many not see in in the checkout_shipping ...

Remember, USPS will only quote as low as:
.0625lbs

so anything below that will be converted to at least that amount ...