Hopefully these show the base and edges better. Thank you for all the nice comments, help, and questions - I'm excited about getting to the bottom of what this is!
I believe that the wide flat area on the back of the point is a remnant of the original flake from which your point was made and not a thinning strike. The maker just made good use of what was already there, keeping his investment of time to a minimum. Here's a couple that I found years ago and many brokes from one site. I would consider yours and all of these Santa Fes. Personally, I try not to split hairs typing points, keeping in mind that their were no QC inspectors or set spec sheets issued to each Indian who I am sure put their own signature style on each point. Heck, look how world's apart different siblings with the same parents can be! I also believe that the end product was also influenced by the quality of stone available at the time. There was far more inferior material at the site these came from than there was good stuff.