The first thing I would look at is the placement of the motion sensors. All of the sensors that you describe are PIR (passive infrared) and all detect in the same way: by a very small change in heat moving across the lens. Consequently if you have placed the sensors the way you would place a camera, so that a person entering the area is walking straight on towards the sensor, that is actually the least likely to detect the person in a timely fashion.
See the community FAQ for more discussion of placement and other tips to get better speed and reliability from your motion sensors: