yup all my clones look almost the same amount of flower as you. I was pissed when i went and checked on mine. Hopeing for them to go back to veg soon. Even had one clone turn hermi on me so i had to rip that out right away.
Look at the recent pics i have in my grow, you will see the branch go from one and split into two main ones, basically cut the prebud off and take the node out then it will split into two branch's and increase yeild once they reveg, thats what i have done anyway