Co-insurance 100% Unless specified below.

I am looking for advice, an explanation really about what I am reading. If I am wrong and how I am wrong. It all started when something I thought should be covered wasn't. Or was it? The way I read it, everything is covered 100% unless it is specified below and isn't limited or excluded. Am I in a simple rabbit hole. If I am right, you have far more coverage than has been interpreted by your Level 2 plan. This is me speaking out my thoughts with the hope that somehow I or someone can tell me what I am missing. Enjoy. And if you can speed up the track.