You have to analyze what the purpose of a "correct" chainline is-
If you have a triple & odd number of cogs, the chain should be parallel to the centerline of the bike when on the middle ring & cog.
A double and/or even number of cogs will change this slightly.

I tend to use the middle ring & outer cogs, so I run a slightly longer spindle to keep the chain running "more straight" on the cogs I use the most.