As far as I can tell the self rate guidelines are not enforced consistently across the board. Appeal process can be random and depend on who you know. Maybe a starstruck person was tickled pink that a former top player wanted to play in their little ol' 40+ league.
I have to admit, I would have liked to play doubles against Leach.
From what I have seen 50 seems to be the age where people's ability seem to fall off pretty quickly, and my guess is that an ex-pro might have quite a few injuries to contend with as well.