[JWait]

Are you referring to the sku displayed for product variants? Lets say SOH-2510 is the manufacturers product number, and it comes in 3 colors (or sizes, it doesn't matter). When you define a product variant in x-cart, the default is to add a number to the end of the original sku, so SOH-2510 becomes SOH-25101, SOH-25102, SOH-25103, etc. depending on how many variants you have. You can change these if you like to SOH-2510-red, SOH-2510-white, SOH-2510-blue, etc. as long as each one is different. The problem is x-cart will show the first available variant that is in stock as the sku.

Ideally, each product that has a option (variant) should display "choose one" as the first choice and cause an error if a choice isn't made... but it doesn't. There are threads where people discuss making this mod in the forum, but I haven't seen one that works. It it did, "choose one" could be sku SOH-2510 and your problem would be solved, but until that happens I think you are stuck.