This is the 1st post I’ve read that says, 2 Defenders looked dodgy. It could be that we only signed the lad from Bolton Thurs/Fri, so not much time to play together. But my take is Delaney only has one foot, (his Left). This got him booked because it was Schoolboy defending, a swing of his Right would have cleared the ball. As in your post, they both got in a mess for the 2nd goal.
Overall though, I thought 1st half we did more than OK. The own goal killed it. Onwards and upwards to the League now.