Yes the Warlock was already in 3.5, but not in the PHB.
No, Warlord it wasn't a typo. That class came out in 4e. Warlock came out in, its been to long ill have to google it. Yeah, Complete Arcane for 3.5.
My co-worker might be full of crap don't know all I was pulling up was homebrew junk. Here's the link to Warlord class for 4e
https://dnd4.fandom.com/wiki/Warlord