USPS Overcharge For Small Envelope

[vivaknievel]

Hello, there...

Is anyone able to guess what I may be doing wrong? I can't seem to get any different results... the example I'm working on now - a 1" pinback button - normally shipping would only be the price of a First-Class stamp. It's less than one half of an ounce in weight...However, the shopping cart is giving no options less than $1.30 for shipping for First Class mail.

I have:
Tare set to 0:0 for both large and small packages
No handling fees
No shipping tax class
No table or zone rates
No per item or per weight settings

What could I be missing?

Thanks for any help!

[Merlinpa1969]

machine rates?

[vivaknievel]

I'll try that out. Thanks a lot for the suggestion!