Bad sign on the bus

I was in Seattle taking the city bus to Adventuress. There was a sign that said:

• Metro has provided 3 billion rides since beginning operation in 1973!
• Thank you for helping Metro reduce traffic, congestion, improve air quality and save you money.
• You're one in a billion 3 billion!

I know that the phrase "one in a million" generally means "you're more special than the rest of the members of a set of a million people", but here it means "you're lost in the crowd". Doh.