setTimeout and LCD

Hi Everyone,
is it correct and intended that setTimeout prevents the screen to turn off, while setInterval isn't?
Also there is an error in the API Reference of setTimeout (http://www.espruino.com/Reference#l__glo­bal_setTimeout)

If you want to stop the function from being called, pass the number that was returned by setTimeout into the clearInterval function.

I think the function clearTimeout is meant here. Also if my statement above is correct it would be nice to have it documented :)