Is the limit because you only know number up to 10 or because after that your drunk or a little bit of both?

In Spanish, up until 1994, "ll" and "ch" were considered distinct letters from the component parts. But "rr" has never been considered distinct from "r," even though it is pronounced differently, in large part because no words start with "rr" and any word that starts with "r" is pronounced with the rolling R sound.