I'm surprised that all your quotations about the observance of the sabbath are not bibilical, so what is it you are trying to teach us? Can you kindly use the scriptures and not those the Holy Spirit denied being included in the Bible because of their contradictions?
I'm assuming you are referring to the answer: You only worship on Sunday because Constantine changed the day of worship The question was about history after the period recorded in the New Testament and thus historical documents were cited to show that the point being made was wrong. However, even that one contains two passages showing worship in the early church was on the first day of the week. But then, people only see what they want to see. For additional scriptural proofs, see:
Since Jesus said to keep the commandments, shouldn't we keep the Sabbath?
Observe the Sabbath: The Ten Commandments
Answering the Sabbatarian
Why do Christians worship on Sunday instead of Saturday?
How important is the Sabbath day?
Were only the sacrificial ordinance abolished from the Law?
Does "remember the Sabbath" imply prior observance?