"I see in the picture clearly the orange form of a person that to me looks like is holding the rail and walking up. I have not edited this in any way and I have in the past taken pictures with large orbs that were almost solid, not translucent. I live in Moundsville, West Virginia and not far from the state penitentiary, but I don't think that has anything to do with this. Just call it beginner's luck in the quest to get pictures of the other side. I just hope it isn't evil.
I have heard people say about other pictures that it was probably a finger or strap in front of the lens, but I know better. The strap was wrapped around my wrist and I've learned to keep my fingers clear when ghost hunting. I thought I would add this lastly to clear up any possible argument about obstructions or moving the camera. If it so happens to be an anomaly from where I took the picture, about 39 other pictures like it have no trace of the color from that mist."
Travis, my first impression upon seeing the photo is that it is a light refraction of some kind on the lens of your camera. Although this might very well be the case and the most logical explanation, there are a few interesting things about your story: that your cat seemed to react to "something" on the stairway; that no other photos before or after this shot showed the same anomaly. If they were taken from the same spot at nearly the same time, it seems likely that they would show the same light we see here. I don't think the Ouija experience has anything to do with it, although I'm sure others might disagree.