I am using chrome..
When I add a task within the quadrant view, it adds it to the not urgent and not important quadrant. When I drag it to another quadrant, it appears that it didn't move (still shows in the not urgent, not important) and often shows twice in that quadrant. If I refresh, then the task is again the single task and when I drag it to another quadrant now, it stays.
Customer support service by UserEcho