Hey! Our shipping system is directly connected to the USPS shipping system, so actually the bulk of our packages are shipped through First Class. The problem may be that your order can only be shipped through Priority Mail because it's over 1 lb. USPS makes it so that all packages over 1 lb have to be shipped through Priority Mail. Hopefully this clears up your question, and I'm really sorry this is so late, but I thought I'd answer it anyway.Is there a reason you only offer priority mail shipping? First Class is only around $3-4 in the U.S.