You can update the file:
webassist/checkout/js/paymentoptions.js
line: 222
by deftaul it has:
wa_ScrollToID("cart_wrapper");
I changed it to:
wa_ScrollToID("eC_PurchaserInfoWrapper");
That brings it a little lower. You could go even lower with:
wa_ScrollToID("Payment_Checkout_BugBitingPlants");