It should get them in the right spot as below in the pic.
In Song > Song Setup > Bar Offset -2
I draw 4 bars or more from bar 1 for initial chord then run the script.
Make sure you load the current Song.txt by unfolding the chord sheet, saving the SGU in the BBvst then reload it first.

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BBvst-S1-Chords.png (152.02 KB, 28 downloads)