I don't know if there's a gap between showing sex and flowering, but either way...
Flowering simply means the light cycle has changed to shorter days (for indoors, the 12/12 cycle) which induces flowering. Sex is irrelivant - if the light schedule is 12/12, then you are in the flowering phase.
To be honest, it looks like you have problems there. Its probably too late to fix them now, but looking at them i'd say you will definitely make it to harvest but your yeild is going to suffer big time.
My first guess is poor lighting or lights too far from the plants, maybe temperature problems or bad nutes maybe even just bad genetics. Maybe a combination. The drooping indicates either over or under water, and the "canoe-ing" or "taco-ing" on some of those leaves indicates the plants are getting too hot (but this can also be a symptom of over fert). Mine are 3 and a half weeks into flower and the buds are probably double the size shown in your pics. I don't mean to put you down or anything, but i'm just telling you the straight up truth.
I'd look at your lighting first. Personally, i would never bother with CFL's at all. Don't skimp on lighting, go and get a 600 watt hps (what i use) and i can almost guarantee you will be getting way fatter buds.
Also, you're better off using both your 150 watt lights over the tops of the plants. I've never bothered with side lighting. Lower buds will always be small. You're better off focusing on the top cola's (and making sure there are lots of them with topping and lst early in veg) because they are where the majority of your buds are going to come from and they also feed the buds growing down its stem. I have big colas at the top with nice thick stems, and the buds directly below it down the stem are almost as fat and juicy as the top one - but they get hardly any light at all. Like i said, the lower buds below the canopy are always going to be small and under developed. Just leave them. They become great candidates for oil, hash or butter.