Jecht>>>Zanarkand...how?

[Tavrobel]

If thats what he ment.

One day Jecht sailed out too far for practice and in bad luck ran into Sin. From there he ended up in Spira. Pretty simple.

according to the flashback at the beginnig that happened when tidus was still a kid.
According to everyones stories sin appeared during tidus blitzball game,unless something happened while I fell asleep at a coupl cutscenes at 5 in the morning Im replaying thruogh now.
my point is the two stories dont make sense

Did you not see the diagram? And the stories make perfect sense. Falling asleep is completely your fault.

Timeline (based on the age of Tidus):
@ 0: Tidus born
@ 7: Jecht goes out too far to practice, encounters Sin, taken to Spira
@ 8: Jecht journeys through Spira, at the end of the journey, Jecht becomes Sin as is the purpose of the Final Summoning, Braska is killed
@ 17: Tidus is now a famous Blitzball star, Sin re-appears in Dream Zanarkand

Not difficult.