Measure 17 is exactly the same as the 1st measure because it’s leading you into the next verse of the song. The first run is just the melody notes all by themselves. Measure 17 starts the next verse which takes the melody and adds rolls to them. Measure 33 is the same at 1 and 17, except it adds an open G and a pinch before the 2 melody notes.
I’m not sure if that answers your question. If not, let me know and I’ll try again.
The thing about banjo is that once you get enough songs under your belt, there’s a LOT of plug and play licks that you’ll find in so many songs. There have been a couple I’ve learned that I literally already knew every lick and was able to nail down in under an hour. It was just muscle memory training. This song was not one of them.