I bought brake pads to do the front of my F150 yesterday @ Oreilys.
I had to go back to get the right pads. For real.
When I returned the first set they sold me, the pads were still in their little shrink wrap (I saw immediately when I opened the box that they were DRASTICALLY different than the ones I was taking off)- the box was open, but the pads were still in plastic.
Counter lady, "If you installed these, we cannot take them back."