I think your position is the more logical of the two and I tend to agree with you.
That also helps us understand why there were no more mentions of any of the other apostles after the events of Luke 15. When Paul and Barnabas departed Jerusalem, that would be the last Paul encountered any of the other apostles before meeting Luke in Troas...thus he (Paul) would have been unable to recount any of the other apostles' actions to Luke after that point in time.
The ramifications of that are, likewise, quite interesting.
Study of the Scriptures is the most interesting thing in the world to study. Sad that so many do not go to the effort. There is something new to discover every time you open the Bible.
Sorry, I seem to be unable to write a coherent sentence tonight.