Bjorn,
Now you've covered both halves of the question. Keep in mind when ordering paint you need to cite both the FSN and the FS number, and make sure that your paint vendor does the same thing. Many don't understand this, and use the current FS chart (FS 595B).
You and I both know someone who bought "24087" - but it was mixed to 595B chip standards, and is no where close to the color you (or he) wants.
Also, beware, many of the FS color-oriented websites target scale modellers, and repeat a number of old wive's tails - however, these problems are typically in the WWII-era color discussions.
Best,
David