As I was meditating more on the scriptures about Paul's testimony, I was thinking perhaps when Paul recounted what happened to him later on in
Acts 22 he may have forgotten all the little details, and what he spoke wasn't exactly the same as he spoke before, and Luke recorded it? I have done that many times!
Also in
Acts 2 when Peter is preaching on the day of Pentecost, he quotes
Joel 2, and the words Peter spoke are not the exact words of the prophecy, could be a similar situation with Paul? Something to meditate on!