1)There are two authentic ways to tie the Sisit (Tzitzis) that have sources. Maran writes to make 7-9-11-13. First question: why does he write this is he then says Gimtarya Hashem is One, when in fact it is not- Hashem is One in Hebrew is 39 and Maran wrote 40 which is not Hashem is One?
2) Why don't at least the Ashkenazim follow the Mehaber's minhag of 7-9-11-13?
3) There is a custom that stems back from Rav Shelomo Molecho who used to make Sisit 10-5-6-5 by individual wraps and the Hida brings that down as Halacha (and see Yalkut Yosef, Sheerit Yosef vol. 1, siman 11) to make it 10-5-6-5. However, for some reason some people took that way and mixed it with the way of the Arizal (see Shaar HaKawanot vol. 1, Tzitzit Derush 6 if I remember correctly) to make 3 Huliot and make 7-8-11-13, as brought down by Kaf HaHaim (siman 11) and the Shulhan Aruch HaRav (see Halacha Berura 11). My question is, some people took the way of the Ari and mixed it with the way of Hida. The Ari clearly states to make 7-8-11-13 with Huliot of 3, and when the Hachamim were talking about the Hida's method it means one by one in the 10-5-6-5 method. However, the popular Sephardic custom to me seems to be made up, and not have any source. Can someone give a source for this method of the 7-8-11-13 with the knots through them without the Huliot of 3?