(John 1.32;43: 2.1.2)
"And John bare record, saying, I saw the Spirit descending from heaven like a dove, and it abode upon him... The day following Jesus would go forth into Galilee, and findeth Phillip... And the third day there was a marriage in Cana of Galilee; and the mother of Jesus was there: And both Jesus was called, and his disciples, to the marriage."
Notice the opening of v32 ?and John bare record? KJV other versions are ?then John gave his testimony? NIV; ?John testified? NASB ?John clinched his witness with this? The Message; ?John gave further evidence? Amplified Version.
What we have in John is not the ?at the time, on the spot? account, but John is telling later on, he is testifying, of what he saw at Jesus baptism, to others.
This testimony by John would have been after Jesus days in the wilderness. Because John would probably have not known were Jesus went after the baptism. He would have been telling others about what he saw.
Then the next day after telling his followers about Jesus baptism (v35) he sees Jesus and if you like says ?Hey look there?s the guy I was telling you about?.
That then leads into choosing the disciples and the wedding.