Double Seed Stitch

Hi,
can someone explain the double seed stitch to me?
I’ve read various patterns—knit 1, purl 1; knit 2, purl 2—
which one is correct? Or are both right?
The real problem is the 5th row: once you’ve finished row 4, you start again at row 1—do you knit these stitches as they appear, or knit them twisted?
So many questions.
Thanks for your answers!

Hello, 
there are different types of seed stitches. Personally, I would call the “double” seed stitch the “large seed stitch.” 
You knit it like this:
Row 1: k2, p2 
Row 2: k2, p2
Row 3: p2, k2
Row 4: p2, k2
You repeat these 4 rows continuously. 
I hope this helps you. 

Best regards 
Michaela