We are both pig zodiac sign born same year 1959. Can we get along?

I am a male born as leo, August 17, 1959. She was born November 28, 1959. on the chinese zodiac, how come it says we could not marry cause we were both born in the same year 1959? I read this in oone of the chinese restaurant here in california. where the owner puts the chinese zodiac signs as table runners or cover. Its on a printed paper. A customer can bring home the paper.