What is interesting with Aquarius ruling both Saturn and Uranus is:
John Jocelyn Aquarius:
`Sometimes Saturn is assigned as co-ruler of Aquarius. The
importance of Saturn and Uranus depends on one's stage in evolution.
Weak souls that have not learned the lessons of the other signs
especially those of Capricorn, which is ruled by Saturn may still
need the pedagogy of Saturn and make little response to Uranus.
At present, undisciplined Egos react unfavorably, unpredictably, and
erratically to Uranus's influence. The more mature the individual,
the more does he manifest the cosmic, liberalizing, progressive, and
cohering influences of Uranus, the planet whose name means heaven'.
'Father, Thy Will Be Done'