Tunisian Crochet Cushion Cover Pattern

This pattern is definitely incorrect in English. Pattern does not match stitch diagram, the rows just don't line up 1 to 2 are incoherent as is going from 5 back to 3. If you look at the stich diagram the pattern should have 12 lines (1 to 6) not 10 (1 to 5). Ive wasted so much time on this.

Pretty sure this pattern doesn't make sense. The swatch starts at stitch 4, the first line doesn't add up and I would have started with stitches = multiples of 4 + 2?