addition bought browsers button buyer cart click computers contact extra login logo orders page paypal processed products resolved shipping shopping suddenly testing top total website zipcode

I have been testing it here through several computers/browsers. I go to the website, into shopping cart. I enter the zipcode, gives me my 7.60 for shipping...i then click on the paypal logo button. then it takes me to the PayPal login page, but I see the total being 43.50 at the top. It says the shipping is $13.55 instead of $7.60. I dont understand
where the extra $ is coming from. We have had orders yesterday that were just fine. Why suddenly the addition in the total and how can it be resolved?

These orders were not processed using E-junkie cart. You can contact the buyer to ask them where they bought these products from.