Surgery on infant plants is not dissimilar to surgery on infant kids. Everything is so small, it's easy to screw it up.
Instead of 'topping' them, you've given 'em a 'FIM'. (Fu*k, I Missed)
If you 'pop' the tops off instead of using scissors, this event isn't as likely to happen. Being such a young plant though, damaged cells rebuild and sometimes the youngster get's the reapirs wrong.

After butchering them this early, hopefully the stress won't stunt them and prevent a full recovery. They aren't healthy (mature) enough to dick with yet, but you knew this already. Usually happens if you don't slice between the youngsters nodes, and leave some part of the mainstem.

Looks like overwatering and a lack of perlite, too. What kind of soil?
Rusty Trichome Reviewed by Rusty Trichome on . Topped at 2nd leaf stage: Got V branches as normal, but top grew back as well! 3 tops Well, as earlier noted SWIM topped one of his plant early as an experimentation. At second leaf stage it was topped, and two new branches grew out in the normal V shaped fashion. However, a few days later, SWIM noticed that the main stem that was topped off was growing back! ? Is this common or could it be something happening because SWIM topped it so young? SWIM didn't think anything would grow up from the topped part itself. So, the two new main branches are bigger, and the one that Rating: 5