One of the big reasons a lot of female disciples were excluded was because the main accounts we get from the male disciples are about Jesus and the Gospels by women tended to focus on other things. There are male disciples excluded for the same reason. In part, this was a function of their society: A female could not be around a male as easily as a male could be around a male without raising suspicion.
There have been female Saints as long as there have been Saints, though. They weren't necessarily subservient, either. One of them was basically a stalker who kept following St Peter regardless of his constant commands to stop following him (following does not mean 'obeying', it means physically following him around). A lot of them disobeyed their husbands or parents to become Christians as well.
As much as people like to portray Christians as anti-feminists, the advent of the Christianity (specifically I know about the Catholic Church) was actually a big step forward for Women's Rights. Possibly bigger than the Feminist movement was simply by virtue of the fact the Catholic Church basically gave women rights in the first place.
As to Leviticus, one does have to remember that Christians believe there is a New Covenant so that we don't have to, say, not eat Prawns. I don't know the theological justification for the hating of Homosexuals (I do know it came about in the 11th century), though I suspect a goodly number of the people who use the Bible to justify such things don't either.