Were they stretched?
7 days in and I usually have max 2 nodes, stacked right on top of each other. Nothing to get in and top. Would mean chopping off the entire green growth. 2 weeks is about the earliest it looks feasible in my grows.
This Kolossus is 2 weeks from seed;
Feels just about possible to me to get in there and do a little fine surgery to remove the top without damaging the rest of the plant. Would have been impossible any earlier.
I don't mean to doubt what you are saying. Just that you must have better eyesight and a steadier hand than me. Fair play.