Thank you @ctheis for the detailed explanation. I could reproduce the images posted by you after changing transfer function and min - max values. Although I am unable to resolve the first issue i.e. if there is any overlaying 3D 2D thing happening. I only selected x-z view and set the center as 10, 20, 50. There is a void and blackbody region surrounding the voxel. Is it happening because of them ? I am attaching screenshots of the regions I have for your convenience.
Regards,
Riya