Swedane --It's not your fault. There are two "click here to purchase and download" links on the webpage you are taken to by VV2 when you click the buy button.
One of those links sends you to the page for VV1 and one for the page for VV2... And unless you're looking carefully for the difference, there's nothing obvious on the page you start from!!
I mean, if the VV2 game takes you to a webpage that is entitled something like "Purchase VV2" --you'd expect that any purchase links from that page would be for VV2.
I almost purchased the wrong one myself.