Hi grwleblanc,
That may be because the view isn't sorted by drag and drop. You can change each view at the top and it needs to be set to drag and drop to allow reordering.

With that set you should see a spot "open up" between two other tasks and you can aim for that to drop the task. I hope that helps!

Keep me posted on what you find and let me know if you have any further problems or feedback about how this is working for you!