If either the door to Room 4 in the west hall or the Dutch Doors were closed by SP prior to Missy arriving then we have something rather obvious going on and it wouldn't look like a staged burglary at all. They would have been seen closing them on camera. More to the point it would make everything SP did in the church a complete waste of SP's time. I mean why bother with anything at all when SP could just wait by the door and kill her without any theatrics.
For me, I believe that SP was trying to make it look like a burglary gone wrong and doing anything that would make it not look like a burglary (such as closing doors) would defeat that purpose. If that did happen however I would have to open my search for a POI with the expectation of finding someone that is not particularly bright, not a planner, and someone that should quite easily have been identified long before now because it would have to be someone that was not only known to Missy to have a beef with her but to others as well. Something like a cop with a Wyatt Earp mentality which would make for a pretty decent sized pool of POIs.
As for the rest, there are quite a number of splices that occur in the video, even from the same camera. Every time you notice the picture "shudder" in the video (for some you can only see this for a few frames) that particular camera stopped recording and more than one video was spliced to create the continuity we see. At least two different times you can see "Loading ..." on the bottom left of frames where longer videos (larger file sizes) are being loaded into the software MPD used to splice it together. This happens when SP goes from the west hall to the south hall and the second time I have seen it occurs when SP comes back down the south hall toward the west. I am still working on finding all the splices. It is very likely there is at least one where SP is at the locked door to the left of Room 4 in the west hall because SP stays stationary for long enough for the cameras to stop recording. There is a shudder when SP goes into the room with the dutch doors as well.
Something that people have to keep in mind with these cameras is that if SP were to simply stop moving or make only slight movements they could be standing right near the camera and it will still stop recording. More so, if SP simply took a step and waited a few seconds and then took another step, and so on then SP could have gone around that church and never appear on camera at all. It is very likely that the software for these cameras had what is called an Absence/Presence setting that wasn't enabled. If it were enabled recording would have started or continued regardless of whether or not SP moved so long as they were in range of the camera.