Steps to reproduce:
1. Open the scene 'Test'
2. Press play
3. Observe that although the moving object has the 3 "OnTrigger*2D" methods, only OnTriggerEnter2D and OnTriggerExit2D are called. BUT if the user toggles "Idle Object"'s Rigidbody2D.isKinematic while the moving object is inside the idle one, OnTriggerStay2D is called but just for a brief moment. Toggling it repeats the behavior no matter if it's kinematic or not.

Using either transform.position, rigidbody2d.moveposition or rigidbody2d.addforce moving method produce the same result.

See the video user attached illustrating the issue: http://screencast.com/t/FW3VdXI3K