Hi everyone, New to this, so hope I am doing this right. Over the last couple of days I have not been able to purchase comics on the DC comics app. Then today I could purchase an issue. When I tried to purchase another issue it would not let me. I click on the bottom to buy the comic and it looks like it is going to let purchase and then the icon turns back to the original display (i.e. $1.99, etc). Any suggestions? Thank you.