I imagine the same was true of each of the Apostles.
Each one taught the doctrine that they had received.
The Apostle Peter recognized that what Paul was teaching differed from others.
Thus confirming the fact.
2 Peter 3:16 NIV
He writes the same way in all his letters, speaking in them of these matters.
His letters contain some things that are hard to understand, which ignorant and unstable people distort,
as they do the other Scriptures, to their own destruction.
Some quick Wiki research indicates that he knew only of the Baptism of John. (initially) Acts 18:24-26 NIV Meanwhile a Jew named Apollos, a native of Alexandria, came to Ephesus. He was a learned man, with a thorough knowledge of the Scriptures. 25 He had been instructed in the way of the Lord...
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