I figured it out

Yay for me

. You have no idea how excited I am!!!
BeeBee, here's the deal...ya know when S.B. says "Where do I stitch? Well, I don't know... it doesn't really matter. There's a time to be a perfectionist and there's a time not to be..." yada, yada. Well, she's wrong (I can't believe I'm saying that Sandra Betzina is wrong

). But, if you stitch on the outside edge of the zipper at that point, then when you turn it and stitch it down, it will be too far away from the center front seam when you stitch down the other side. So you need to stitch that first side close to the zipper coils. It doesn't have to be super close, but maybe 1/8" away.
Now, Sandra B., if you ever read this please know that I totally admire you and love your books and tutorials. I've learned a ton from you. Actually, when you made that tutorial, I'll bet you never realized that there would be someone as stupid as me out there that would stitch on the outside edge of the zipper

. But, alas there is.

.
Anyway, I just put in the most beautiful fly front zipper

.