@hark. Pretty much on the nose of what is happening. I think my expectations for what the camera would do in that mode, based on what I have been reading, was just not reasonable. (If you meter on dark, it wil compensate and vise versa). I will check my metering as well because when I shoot in manual, I use spot metering. I will look at the exposure lock since it is something I don't use.
Working in changing light for wildlife is a challenge. I am getting out more and not just shooting at birds in my yard. Mostly, I do what you normally do. Quickly mess with the ISO or exposure comp. After a few test shots, I can get pretty close and then tweak. With A mode, seems like every little tweak was overcompensating for lack of a better word. I will look at my metering. Thanks, Hark
@egosbar
Right on. Using auto ISO is pretty new to me. I thought maybe using some of the auto features might make my life easier or you know it might be one of these, "Hey, why haven't I been using that all along" moments. However, we all know auto features can only do so much, you still have to look at what the camera is doing. So, all of the wonderful people who are taking awesome images using A mode and auto ISO on this forum, are people with a lot more experience than me, and that is where my expectations went wrong (I am guessing).

. So, I will look at the bracketing because I may have been messing with the camera, and will look at the metering and see if I can get myself closer to where I want to be. A few people mentioned metering, so I will look at it.
I have to say, going from the D300 to D500 pretty much shined a big light on my weaknesses. I have pointed that out before. Just need to practice some more. This, for me, is all about learning some new things that might help me. If it is a feature that I find doesn't, I just won't use it. I can't learn if I don't try.
Thanks all for your tips, everybody. I am also going to dive into the menus and see if I have the camera set to act a certain way like when you set the stops of exposure compensation, etc.