I'm not sure. It's not that I believe that the NO Confirmations are invalid, but more lacking in the fullness of what we receive through the Sacrament. I used to be very critical of people who did this, but I'm beginning to understand how the NO may be valid, but completely lacking in all the available grace. So when a guy as horrible as me goes to a NO mass, I.get little or nothing. So maybe my Confirmation was the same?