Did I just get scammed?

[Liz]

Okay so I just sold my samsung galaxy s4 on ebay. I've always used ebay to sell and I've only had one other issue but it was paypal and I get it taken care of. Anyways, so it sold this morning around 9 am and then after it sold I sent the buyer the invoice. I then left for work, I just got home from work and I got an email at 3:30 and it was my invoice but it was sent to me. It had the buyers user name but this is what it says...Thank you for shopping on eBay! Your total amount due is $$$$. More details about your purchase are included below." But why would it be sent to me? This has never happened before and if it has I don't remember it. Any information would be great!