The purpose of chronology is not so we can put the right number in the right check box and be proud of ourselves. The purpose of chronology is to provide the proper perspective for looking at events in the order they most likely happened.
The numbers matter for two reasons. We have to get the story straight. And we need to feel confident that the story is straight. We aren't trying to get the context of a verse here or there. We're setting our sights on the whole panorama. Bethlehem. Nazareth. Galilee. Jerusalem. Antioch. Galatia. Greece. Asia. Crete. Italy.
The new testament is a story that needs to be put into sequence. It's sentences do not need to be numbered. It's events do.