I see that many people are having the same problem as me. I was scrolling through the stock library, and have inadvertently purchased a license for a picture that I do not want. The photo has ID 116802060. I have not downloaded this image.
Please add a confirm dialog to the license option, as many other people have requested. It makes me think that Adobe sees these accidental purchases as part of its revenue stream. I hope this is not the case as that would be very unprofessional.