Is this some kind of scam? I bought a product, and the seller posted it again one hour after

So, I bought a swimsuit and received a message from Vinted saying the purchase was successful. But just an hour and a half later, I saw that the seller had relisted the exact same item (for 5 euros more). I messaged her about it and asked when she planned to ship the item, since I’d just noticed she’d relisted it even though I’d already bought it. She replied something like that « hello, oh yes, darn, I hadn’t seen it—it was under review earlier, so I reposted it, but I’ll take it down now. Thanks for letting me know ☺️,” but she didn’t actually delet the new listing.

Is this some kind of scam, and what should I do if it is?