OK, let me wrap my mind around this whole thing:
K1= -3956
Star Wars: Knights of the Old Republic - Wookieepedia, the Star Wars Wiki
From Dorak's K1 dialog:
All contact was lost. For many months it was assumed some great disaster had befallen the entire fleet. Everyone thought they were dead.......Three years ago, Revan and Malak returned at the head of a massive invasion fleet. Revan had assumed the title of Sith Lord; the hero had become a conqueror.
Therefore, Revan returned in -3959
I assumed that "many months" meant two years. I thought K1 took place 5 years after the end of the Mandlorian wars for some reason.
TSL= "approximately five years after the conclusion of the first game" (which is where I think I got confused. I must have incorrectly remembered this as the K1/Mandalorian wars time line)
Star Wars: Knights of the Old Republic II: The Sith Lords - Wookieepedia, the Star Wars Wiki
Exile returns: -3951
The Exile "wandered the periphery of known space for nearly a decade"
Jedi Exile - Wookieepedia, the Star Wars Wiki
So, "nearly a decade"=8 Years.
Therefore, it took the council exactly "many months" to haul the Exile in for exiling.
Yes, it is all crystal clear now:p