I went back for some 2/4 live this afternoon after dipping my toe in the water yesterday and finding it warm and welcoming. So, after being there a while, my table happened to clear out quickly and for a short time we had only 4 players.
I was in the BB. CO raises. I hold

. Reraise. CO caps.
I mean, I thought he capped. I called his alleged cap, and he threw more money in. The dealer looks at me like I need to do something, I'm like I just called his bet. The other 2 guys at the table agree with me. Dealer and CO explain that because we are heads up and I am acting last, he can continue betting. This makes no sense to me. It is impossible for me to act in a way that will let me see a flop. I either fold or keep going until one of us is all in.
So we get to the point that CO is all in, pot is about $40. He shows

.
Flop brings me two aces and that's that.
But, what the hell was going on?