Yissachar Dov Rokeach (born 19 January 1948) is the fifth and present Rebbe of the Hasidic dynasty of Belz. He is the son of Rabbi Mordechai of Bilgoray (1902 – 1949), the grandson of the third Belzer Rebbe, Rabbi Yissachar Dov Rokeach, and the nephew of the fourth Belzer Rebbe, Rabbi Aharon Rokeach, who raised him. He has led Belz since 1966.
In 1966, the Rebbe of Belz was succeded by his nephew.
Yissachar was the nephew of the fourth Belzer Rebbe.  He took the mantle after the fourth in 1966.  Thus, he would be succeeded by his nephew.  The computer probably had issues because it omits a lot of info that has to be inferred from the context.