I live at number 6 in a road where the next-door neighbours are at 5 and 7, but many people who live at number 6 would have neighbours at 4 and 8. The houses in some roads don't have numbers at all, only names. American house numbers are beyond my comprehension. I have a friend who claims to live in a hamlet, but whose house number is 3636. The first numbers indicate the street number, even if it has a name, so in this case the house was number 32 in 165th St.
Sports are a rich field for abnormal notation.
In betting sports, however, 5-1 means something else entirely, that if my horse wins then I'll receive 5 for every 1 I bet. In tennis 40-30 doesn't mean 10, but that the players have won 3 points and 2 points. If you narrowly miss the 20 region in darts you're not likely to score 19, but either 1 or 5. Leading zeroes, cavalier use of signs - they're all here. Don't forget that American use means all these dates indicate April 6th rather than June 4th.