i am a dragon man born 06/27/1976 and my wife is dog born sept/30/1982 but we love each other?

well as i have read about chinese zodiacs a dragon and dog my wife sign cant get along with each other but in our case we had been married for 5 years though we quarrelled a little but still we remain sweet and loving to one another so im just wondering how come we get along well but our signs cant be together as what the chinese astrology says