Hi there, the same thing happened to me and I also thought it was strange, so I contacted the team directly (via the contact form on guysfromandromeda.com) and Chris Pope replied to me saying that they had indeed received the payment. Yet, I never got a confirmation via email (other than the paypal receipt) so I guess this is a normal behaviour, but you could check directly with them as I did:
http://guysfromandromeda.com/contact-form-general-contact-questionscomments/
Hope it helps.