ISM Adamo question - help me please!

I know there are a lot of Adamo users on this forum, I'm hoping to get some advice. I bought an Adamo road for my road bike and had my first ride today. On a 30 minute ride it seemed comfortable enough, no numbness , but definitely a different feel/pressure. But I think I could really get to liking it if I rode it a little more....

But here's my problem. I had my wife helping me get the fit right, she measured my forward/back position and knee over pedal position etc on my existing saddle so we could try and keep my fit as close as possible (I was fit at the bike shop when I bought the bike). My original saddle is a Specialized Alias. It was mounted pretty much in the middle of the rails, I'm 6'3" and ride a 58 cm Specialized Allez. According to my wife I sit pretty far back on this saddle so that she cannot see any of the back of the saddle, I just barely hang over the back edge and cover it all. This is in a somewhat upright position with my hands on the horizontal part of the handle bars. I guess this is typical???

With the Adamo, we watched the "Installation Video" on the ismseat.com website and it showed quite a lot of saddle visible behind the rider. And sitting on the Adamo, this is indeed what feels "right." But to sit on this saddle in this position, even with it mounted all the way back on the rails, my knees are still about 1.5 inches forward of where they were before. That puts them 1.5 inches forward of the enb of the crank when horizontal. And I have to say, the saddle does not look "safe" hanging that far over the back of the seat post. It's literally all the way back on the rails.

According to the installation video, the rails should be in about the same position, but this is NOT at all what I found. Anyone have some advice or comments?

Thanks in advance!
Mike