In Sefer Likutim(http://www.jewishmalibu.com/media/pdf/65/zGlj655600.pdf), Rav Chaim writes that at the Splitting of the Sea, Hashem diflected the Samech Mem’s kitrug over to Iyov, who is a gilgul of Terach, who was ultimately helped by Elihu ben Berachya, who was Yitzhak. So my question is, if the Splitting of the Sea was around 210 years after Yaacov + family went down to Egypt, which was around 220 years after Yitzhak was niftar, how does this work out at all? Note: It says Iyov was in the days of Yitzhak, so seemingly not a gilgul etc.
ב"ה Shalom I will answer according to my understanding of the Talmud on this issue. Already in the Talmud there are many opinions as to when Iyov lived and he is placed in many time periods. In order to put things in order one must follow one opinion and follow it through. There is an opinion which says that there never was an actual Iyov and he is only brought as a parable to learn from. This opinion is followed by Maimonides. (Talmud Baba Batra 15a, Maimonides guide to the Perplexed 3:22) All the best