[Hey everyone, if you're having trouble with your family tree look at this tree (whoa easy there Zeus), this tree (it's so fun!) and this tree (most extensive) They're the most accurate/extensive that I've found. There's a couple of us that are out of place due to conflicting mythologies, so I just thought I'd help c:
Aphrodite and Eros seem to be the two most commonly switched up. Aphrodite was either the daughter of Zeus and Dione or born from seafoam around the time of the Titans (this is the more famous version) making her older than the Olympians themselves.
Eros, on the other hand, was either a primordial god (meaning he had no parent and has exitisted since existence was a thing), was born from Nyx (like Thanatos), or is the son of Aphrodite and ares (which make a hella lot of sense and is the most popular version).
again, it's up to you for your final decisions. I'm just helping out so everyone's not like, "are you my sibling or uncle or cousing or whaaaat?"]