Built in I-Cord (RS rows): K2.
Built in I-Cord (WS rows): Sl 2 pwise wyif.
Follow this, for the built I cord right side, i knitted 2 stiches to the cable needle and then slipped them back. Last I put 2 stiches on to the cable needles one more time. , Is it right or not?
No, you don't slip the sts back. On RS rows, just knit them with the regular needles, on WS rows slip them and turn. It's 'built in' so it's created with the regular stitches.