well, depending on what strain your growing.. some strains do this... while others don't.
Think of it like this.. none of us are made the same. I mean, nobody has a 'carbon copy' (replica) of themselves out there. Why? Simple.. because of the genetics and the difference in each genetic makeup of each person. Nobody has the same exact DNA, as another person.. it just doesn't happen.
Either way, your going to need to post some pictures of what your talking about, otherwise you'll more than likely never get the correct answer and or any help.
If your talking about seeing a branch growing out of the nodes.. that's completely normal (for some strains, apparently yours is one of them). Sometimes this can be caused by extreme stretching.. which is caused by the grower placing the grow light(s) too far away from the plants.. therefore causing the plants to stretch out further than they normally would have to.. because the lights are too far away from them. But like I said, sometimes.. no matter how close you place the lights to the plant.. some strains just branch out like this.. due to its genetic makeup.
Bottom line though.. is, you'll need to post a picture of what your talking about in order to get an appropriate answer.
good luck.
peace.