ok first of all.....i dont think you're catching the point i was trying to prove that oro had no intention of taking itachi's sharingan
the only reference to having anything to do with itachi's abilities was when kabuto said "if itachi couldve helped in the war on konoha, things wouldve been different"

and it sounds to me like alot of the discrepencies in the ages from your observation is based on guessing.....namely, with the assumption that the whole storyline thus far has taken place within a single year. Maybe I think a year has passed from the 1st episode to the fight with naruto and sasuke. Therefore sasuke would be 13-14 and so itachi would be 18-20. Then maybe the conversation between the akatsuki took place several months after the fight, and so itachi couldve been 19-21 when they said "7 years ago"

then there's always little details that might not be exactly accurate but shouldnt have to be
like maybe when sasuke said "im the same age when he graduated," sasuke meant "i am half a year younger than he was when he graduated," but it wouldve been lame to be so specific.
And when the akatsuki said "7 years ago," maybe it was more like "6.65 years ago"