[quote=Zarkun]
But the water for Hylia comes from Zora's Domain. I played OoT, I'm not nuts!
[/quote]

I dont think you're nuts! It's just that The lake supplies the domain which supplies the river. You might remember that the lake flowed into the domain and the river... So the waters source was technically the lake. there were some dialogue mistakes in OOT that stated otherwise, and the mistake was never fixed for oot because that was before you could up and patch a game