So I got to the point in the game where you fight kill Jacob Seed, and I did just that but the mission didn't end. Every time I get back into the game, on the left where it shows your mission goals, it has everything green and checked, including kill Jacob Seed but the game didn't progress further, like I didn't kill him and I still have to do the mission. It won't even let me track a different mission. I am very confused and I am wondering how to fix this without restarted my game from the beginning.