An update to my situation. I was able to get the Apple Watch Series 2 exchanged for another Series 2 Space Black. All was going well and upgraded to Watch OS4. One day out of the blue (about 10 days later), I answered a phone call and then ended the phone call. Thirty minutes later, I noticed that the watch had turned itself off. This occurrence, the power button did not turn it on so, I had to press the crown in while turning the power on to get the watch to power on.
Also now, in some cases but not all, I am getting iMessage texts that were sent 3-4 hours or in some cases the day prior as though they had just texted me. For example, someone sent me a text at 4 a.m. today and read the text at 6:30 a.m.. Then at 8:30 a.m. the text comes through on my watch as though its a new text. I look at the my phone and see no new text message notification. Its just the same old one I read at 6:30.