Interesting story. I had the opposite happen to me. I played one year of high school tennis and haven't played in 15 years up to this year. I am playing in my first USTA tournament tomorrow and I was self rated at 3.5 on the USTA site after answering the questions. I appealed it for a 3.0 but was denied. Their reasoning was that even though I was only a player for one year in high school, the fact that I was a collegiate athlete in college (swimming) that I had athletic ability and needed to be 3.5.
The tourney I entered didn't even have anyone enter 3.0 or lower, so I got bumped to 3.5 anyway.