66 Barracuda headliner install problem

I've tried several times to install my new headliner in my 66. I bought the headliner from Legendary and believe its of high quality. I was very careful in taking the bows out of the old headliner and putting them in the new one in the correct order. The problem I'm having is getting the bows to seat in the pockets. I started at the back and worked toward the front. The first three bows seated fine. Now the fourth bow will seat but it slanted back and the front most bow is seated but is slanted way to the back. As a result there is a lot of puckering in the front area and I can't seem to get the bows pulled to the proper location. Is there something I'm doing wrong?