I thought the same thing too, and I even posted a response to you! Doing a little more research I learned this:
HOMONYMS are words that sound alike but have different meanings. Homophones are a type of homonym that also sound alike and have different meanings, but have different spellings.
So technically that list IS a list of homonyms, but more specifically they are homophones.
It's sort of like saying
Here is a list of aquatic animals:
More precisely it is a list of fish, but it's not wrong to use aquatic animals.
Interested in Language