I had this happen a couple times, only once I made it home with the fabric. It was a blue cotton I got the fabric home and not only was the feel different but the color was too. It was two different brands but they had rolled the one yard cut around the bold. The other times that it has happened is I have gone to get some muslin and I grab the bold I want, then I get back to the cut table and they have two or three different fabrics rolled around the bolt that says the size I want. Sometimes its not even all the same size, sometimes not the same color. I always watch what they are cutting and I now I refuse the precut pieces that are wrapped around the bolt.
Anyways in the case of the mismatched blue that made it home I took it back to the fabric table with my recipt. they told me to go get the fabric I had orginally gotten and they cut me another yard of it off. I was happy.