Below is a Google drive link with the file and a .png sequence of the video that is tracking. I hope that is okay.
Since I can't share the exact scene file I did a quick recreation of the scene. The problem still occurs on my home PC as it did on my work PC. Both the same version.
Basically what is happening is if I am adding tracking points and go into another mode such as polygon, point, edge, model, texture, etc, I can't go back to adding more tracking points. I know that these modes are not useful in tracking but I clicked on one by mistake and can't figure out how to go back to adding tracking points.