The correct shipping rate option is not showing

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I'm testing my site that I want to open shortly.  I had it running and working fine in Spain but it appears differently in australia.  I have three shipping rates for people that purchase 1,2 or 3 shoes.  One of my testers is buying one pair of shoes but is only being offered the 2 & 3 shoe shipping.  Can you please advise what I need to check , change so that the correct shipping rate appears?

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