Sorry about your Cojack. I hope your daughter is not disappointed and will continue to make other cheeses with you. So, you have a ready supply of salad crumbles.
On the Jack. It does have a very noticeable after taste, somewhat bitter. But I found today that if I leave it out to air for a while before eating, the after taste disappears. It is, unfortunately, too dry to be a really good cheese. The problems I had with the pressing were obviously its downfall. I will be making another in the future with some Jalepenos in it. I love pepper Jack.