Being new on this forum and not reading all of the posts in detail, one thing that seemed to be here is a misunderstanding of the Old and New Covenants. I'll not take the time and space here to go into more detail, but an understanding of the covenants is vital to understanding the role of the Sabbath, along with several other topics, including salvation.
For now, I'll just make one comment. There is no such thing as a "Ten Commandment Law" for a New Covenant Christian. No, this is not stated to stimulate a discussion, but it is a "thought statement" to introduce a vital subject that has, and still does, need much more understanding. I pray that as we do, that the plan of Salvation will become more clear and beautiful.
Maranatha
Ray