Vayishlach

32,19-Yaakov tells the 1st group of malachim that he sends with presents for Eisav to tell him A)The presents are your servant, Yaakov's B)They are a present for Eisav C)Yaakov is behind us. 32,20-Yaakov tells the rest of the groups exactly what he told the first group to tell Eisav. 32,21- "Also say that Yaakov is behind us".Why does Yaakov randomly repeat to say that Yaakov is behind us? He just said that! Also, why does Yaakov call this an additional point?