Ok, now I'm really pissed off!
Today, I took my plants out of their place for cleaning and decided to inspect them. One of the plants that had only female flowers, had two clusters of small balls in the main stem, near the bottom. They seemed to have some kind of small opening in their tip so I immediately decided to remove all of the balls in every plant. Remind you these were the first clusters I found. Still, none of them had any pollen-like substance inside. After removing 8, maybe more, "balls", I find a similar cluster in one of the "problematic" plants, resembling male stuff but with pistils! I think I might have cut bus instead of male balls...
My hands are really tied here... really don't know what to do! Some of the ball-like stuff is 2 weeks old, no pistils, no clusters, no clue at all. Some others, are younger and show pistils...
Please, someone help me!