checkerboard afghan square from knit & crochet today show

hello, at the end of the 2nd row of this candi jensen pattern it says; turn-6ch-2sps & the beginning of row 3 says; ch 5.   the end of the 3rd row says; turn-7ch-2sps & the beginning of row 4 says; ch 3.  any help understanding these instructions is greatly appreciated . thank you p.s. i have searched for this pattern on the errata page.