Northern Lights Auto (Old Vision Seed)

I'm growing in soil that's 23x10cm only. The plant continues to show deformity albeit a bit less.. I looked though and found one side of a node had sprouted a deformed double branch. One side was normal, the other like Siamese twins.. chopped both of them and razor bladed the stem so it doesn't try to sprout more branches from same spot... the stem will heal. Rather that than waste more energy making shit. Does anyone have any thoughts to deformed leaves... Does it do more harm to let them grow deformed than to just chop and leave the nice growing ones? One to wonder.. Anyways IT seems to have stopped gaining as much height at 17cm, It looks like side branches are pushing up through nicely. I have concerns my light is too close(see closeup of top)...I assume the thing is starting to push flowers *shrug* I'm gonna wait and see. Thanks for reading. Might update later in the week