Planets' own houses

According to the Vedic planets own two houses each. I doubt whether it is right. Mercury owns Gemini and Virgo, Venus owns Taurus and Libra, Mars owns Aries and Scorpio, Jupiter owns Sagittarius and Pisces, Saturn owns Capricorn and Aquarius and Sun and Moon owns only one house each. I include eight planets, Sun and Moon in my astrology, but Rahu and Ketu