These units are percentages? If they are, what am I missing? Both columns add up to way over 100%.

If you dont add the API, the rest should add up to 100.

Don't add the sulfur % (as the sulfur compounds are already distributed in the various boiling fractions) nor the API gravity.

Slatz & Iconoclast: thanks you guys! I knew I was slippin' a cog someplace.