Wade, it's going to be a learning experience for you making a bow.
Its difficult for us to explain things in here.
I was lucky as Bowjunkie who replied above took me under his wing and taught me in his shop.
The glue joint is what holds the bow in its shape after you take it out of the form.
If you used those wide posts in your picture, the bow would come out of the form with flat spots on both midlimb areas right where the posts were. 100% guaranteed.
Glue up is only a minor part of making a bow.
The finesse work begins after glue up.
But go for it, we all started like you are now.
Take notes and pictures and post the pictures here.
And remember this, once you start removing wood with power tools and hand tools.
Go slow and think, because you can always take more wood off.
BUT, if you take too much wood off in one little spot, you can't put it back on.
And the bow will be toast.