If this were a spat between two historians of yesteryear, then this would be a moot point. Unfortunately, the spat never ended apparently.
As I stated earlier, there are two historical markers: one of them is an older marker placed by the Payne County Historical Society at the Twin Mounds Site, and the other marker is more recently placed by the OHS at a location south of Keystone Park. Perhaps the OHS does not wish to take sides (either at one time or concurrently). Yet, we still have a marker placed by them at a chosen site. Payne County Residents who support the Twin Mounds Site are very strongly supportive (to the point of scary sometimes) about "their true site and marker".

Conspiracy? I have no way of knowing. What I do know is that prior to the 1940's, Keystone appeared to be THE site of the battle. Today: the Keystone site is buried under a lake built in the early 1960's, major highways run around it, and development is sprinkled throughout. The Payne County Site? It appears completely intact or untouched, and has yearly reenactments nearby in a town park.
I find that more than odd.

One could say that development at Keystone is simply a sign of progress, a tribute to man's ever widening acheivements and ambitions and need for more space. Yes, but what is the ambition behind it? I have seen many historic landmarks come crashing down due to someone signing a paper or making a decision. A sad event that always involves some equally sad, accepted reason: we needed the space, I wanted more parking lots for my condos, or development, development, development. There is also a decision sometimes not to build and save our landmarks. As I said, someone is the decision holder. Yet here, with the historical site and a disputed historical site (yes, there can be only one)we have something different. Question:A decision to change the site for what gain? Why is one site supported and another almost forgotten? Seriously, I have found webpages made by people showing information and photos about the so called "Battle of the Round Mountains" at Yale, Oklahoma. When I email them and bring up the Keystone Site, they act like I am crazy and/or say they knew nothing about the other site. Typical. There was a time where I had no idea of our Civil War Legacy in Oklahoma. I have to blame someone for that. Two sites of one battle seems even more embarrassing.

I could go on about how I feel about other neglected historical sites and apparent rewritten history, but I will end this here.
As always, this is just my respectful opinion. I do keep an open ear and an open mind. I have read the Yale Site information thoroughly from all the sources I could find. I just feel that things to not add up.