Your not suppose to top a plant after going to 12/12, only before! You are cutting bud nodes off every time you do that. She is probably female if no balls have apeared yet. And I agree with Perp every time you cut her, you are putting her back a week. From what I am gathering from your post is just when your plant recovered from the first cutting you cut her again and put her back a week again.

When your plant goes to 12/12 she goes into the strech phase for 3 to 4 weeks, meaning she will tripple in size during this time and you need to be prepared for this when going to 12/12.

JG