Very weird shipping mixup happened to me.

I came home today and found a package for a Sunrich Toys and Collectibles waiting. A quick search showed this business is in California despite my being in Nebraska. What's wierd is that it has my home number and address. After looking up and calling the guy who sent it out, he explained it was a broken return, he runs a business of his own, he said he just put the UPS provided return label on the package so he didn't actually put the address on it.
Any ideas how my address got mixed up with a CA address?
Any ideas how my address got mixed up with a CA address?