Hello everyone. Long time lurker, seldom (well, this is the first time) poster on rollitup. I'm pretty new to growing cannabis, but I live in Uruguay where it has recently been legalized and I am taking advantage of my freedom. 
I've already made a few mistakes this grow, though I've stepped it up a notch from last year... I'm growing my autos in 3.5 gallon pots of coco coir & perlite. Been using nutes at 1/4 and then progressively stronger ratios a couple weeks after she sprouted. Her little sisters are smaller and hopefully won't suffer such a cruel fate.
Anyway I started LSTing her just yesterday, but today I wanted to adjust the position a little bit because I thought it was too high and I accidentally topped her.
What do you guys think?
Also, some small, lightly discolored spots on the tallest leaves, is that a sign of nute burn?
Any help would be much appreciated!

I've already made a few mistakes this grow, though I've stepped it up a notch from last year... I'm growing my autos in 3.5 gallon pots of coco coir & perlite. Been using nutes at 1/4 and then progressively stronger ratios a couple weeks after she sprouted. Her little sisters are smaller and hopefully won't suffer such a cruel fate.
Anyway I started LSTing her just yesterday, but today I wanted to adjust the position a little bit because I thought it was too high and I accidentally topped her.

Also, some small, lightly discolored spots on the tallest leaves, is that a sign of nute burn?
Any help would be much appreciated!