"Multiple payments not allowed, please close window and start again..."

That is the msg I got after pressing pay now in paypal, and I do as "Simon says" but the first payment DID go thru so I ended up with 2 gem packages.
Now I know I will get refunded, thats not the problem, but if this is happening with many ppl then theres always someone that dont bother contacting support about the matter. So whoever is incharge of the transaction section, please look into this.