***And now we have God being called the LORD when in Corinthians we read that Jesus was the Lord...
God can be and is logically the lord, because it’s his world and he is greater than all (cf John 10:29), greater than Jesus Christ himself (cf John 14:28). Anyone can be a lord, but Paul recognizes only one God, the Father. And so does Jesus (cf John 20:17).
As Mark correctly observed, the Greek word kyrios (master, prince, emperor, teacher) translated as lord is a title, specifically a title of ownership—one to whom things or living being belong. Since all authority on earth was given to Christ, he is the Lord over all on earth, but he is never called God; only the Father is. And the way the New Testament reads, the Father is the Lord over all, including Christ.***
That’s something that needs to be emphasized: the use of titles in Scripture. How many human lords were identified in the OT? Britain uses the term ‘House of Lords’ which served as the model for the United States Senate and was populated with those entitled ‘Lord’.
The term Christ is a title as well. It’s easy to get lost in these passages unless one knows what things mean, and then to put them into context using the Church as the guide.
***Obviously something other than “sola scriptura” had to play a role in the 300-year long development of Christian theology and canon. ***
What many people want is to relive those heady times and to take on the task of inventing their own theology using the Catholic canon, while repudiating the Church on every other matter.
Have you ever heard of the Trinity?
Without a doubt a sadly neglected topic. As you observe correctly, Christ is a title, but so is the son of God. Remember there were no lower case letter to distinguish the Son from the son. The problem is that Greek christos simply means the anointed one. And the son of God was a title given to angels as well as human kings, who were also considered anointed by God. But the term never meant a divine person. Thus, Greek readers encounter "christs" (or "messiahs" in hebrew) all over the Old Testament, such as David:
"He is a tower of deliverance to His king, and shows lovingkindness to His anointed [i.e. christ], to David and his descendants forever." [2 Sam 22:51]
The Greek Septuagint reads: "
μεγαλύνων σωτηρίας βασιλέως αὐτοῦ καὶ ποιῶν ἔλεος τῷ χριστῷ [christo] αὐτοῦ τῷ Δαυιδ καὶ τῷ σπέρματι αὐτοῦ ἕως αἰῶνος [2 Kings 22:51, LXX]
MB: LXX does not divide Samuel and Kings, there are Kings, I, II, III and IV]