Vuforia 5, jitter in AR object while moving the camera + motion

I'm using Unity 5.6.7 with Vuforia 5 and trying to solve the problem of jitter in AR object that we experience when moving the camera in horizontal or vertical positions while being in AR mode of Vuforia + Unity 3D + Oculus SDK - AR/VR Digital Eyewear example (I did not see much problems with rotation yet).

I need help on how to approach this problem. While searching for the solution I came across https://developer.vuforia.com/forum/unity-3-extension-technical-discussion/filter-camera-position-and-rotation-avoid-jitter, but I could not find a way to implement at on Vuforia 5. I'm using Gear VR so I don't have any positional tracking from sensors. I'll have to rely on vuforia for the position of AR object.

I have 3 questions:

1. How can I get and set AR object's position? How can I smooth the position on every frame using filters such as double smoothing to avoid jitter? (I also need to scale my project to multiple targets in future)
2. How to solve motion blur problem in vuforia when we are in camera see-through mode?
3. Why does the jitter occur? Is it because of the latency that occurs due to time taken to track the position of the image target? Any other suggestions on how to solve the jitter?