Side Lateral Dumb Bell Raises Concern...

I'm guessing you are doing them straight arm? What happens when you bend slightly at the elbows or keep a 90-degree angle at the elbow?

I have a shoulder that pops on those as well, and a slight bend seems to help. I don't know the science behind it, although I suspect it has something to do with the physics of the weight and the angle and the force placed on the joint. Personally, I tend to skip that exercise, as I find the overhead press seems to cover shoulder work pretty thoroughly (and I'm lazy).

It may not be anything, then again, it may be something. Personally if you are new to lifting weights side lateral raises are not really something you should be focusing on. That is what is called an isolation movement. In other words it focuses on one rather tiny muscle group at that in that is pretty much works only the deltoids, and really only primarily the lateral head of the deltoids. There is a place for such exercises, but not generally for a beginner.

I would say focus on dumbell overhead presses. They will work more of the overall shoulder structure, your arms, and if you do them standing it will even work your stabilizing muscles. Notice by doing them you work more than you ever will with an isolation exercise.