When to drink - how to count

[sgutte]

This is the Novice forum so here is a real newbie question:
1) Wine charts typical advise the number of years to age a wine before opening.
2) On a bottle there is the vintage

Lets see if I have this straight. If the grapes were picked in 1999 and aged in barrels for 24 months (bottled in 2001) then the vintage is 2001 and if the recommendation is to age for 2 years then I should drink in 2003. Other grapes also picked in 1999 but aged 12 month and bottled in 2000 the vintage is 2000 and then should drink in 2002.

I hope I am clear with my question.