1 out of 4 shelves was the wrong color. It was a hassle to return so I ended up keeping it and just ordering another white one. 
Even thought the shelves had the same mfg. name, they were different, with different hanging methods and hole locations. I'm just glad my husband checked before pre-drilling all the holes. 
One plus to the order however, when I checked a week later I noticed that the prices had dropped by about $5. I contacted Wayfair and they provided a store credit.