Attempted a $1000 transaction at Kroger with 2 vgc vanilla by Incomm last week, first swipe went, second "not authorized". Waited till today, feeling encouraged by your post, different card on the first swipe accepted again, second one "not authorized" but it was the one I used last week that was accepted. Only since the end of December have I not been able to do 2 swipes. Tried to rerun as $500 transaction and got "not authorized" on every card. Are they limiting to a single swipe now? And not letting repeat transactions with vanilla cards?