On the first pattern set up row, go back MORE than 4 rows. You are doing short rows…so 4 rows back would vary, depending on where you tucked back.
Go back to the first row.
On subsequent garter joins, go back to the last garter ridge. The original instructions are correct for the stitch pattern if it was knitted without short rows.

Typos/errors:
Row 39: Knit to last six stitches, turn.