I had a similar experience. I mistakenly ordered 2 instead of 1 of an item. When I asked how to return it, they told me to keep it. No problem.
While I’m here - I frequently order from Walmart.com. I got an order of canned food and personal care items that looked like an elephant had stepped on them. They were OK to use, but I thought I call and mention that they weren’t prepped for shipping very well. Walmart told me to keep them and sent me a whole new order (and it was a lot), for free.
I bet there are a lot of people who order 2-3 of an item to see if it fits, don’t like the color when they see it in person, etc. I try to think about my choices and read the reviews. If I feel uncomfortable, I don’t order. Simple. I rarely have a return.
Well, the cookies I ordered from Wal-Mart were delivered as a package of buts and pieces. I sent a note to customer service that I was not happy about it, but so far, they haven’t sent me any new cookies. (I ate them anyway, but it was not very good customer service, if you ask me....although I WAS a little snippy about it...)