(I did the same: initially made and paid an order selecting the wrong shipping option, and shortly after cancelled it and made the correct one, and within say a quarter got a surcharge request, a few hours later a refund for the first order, and I then cancelled their surcharge request on PayPal)
Right, that's how it went for me, too. (Also, my latest order was supposed to be the last item in stock and now there are 10+ again 😄 — they must have excellent workers who continuously fill up stock...)