that is a nice plant, i'm trying to grow some lr2's now too and although my one plant looks a little different than yours, its only a little over two weeks and the growth is very good. looks like its going to crowd the others, kind of like yours.
temps range from 75 to 85 prob depending on when my girl turns off the ac and closes the closet door DOH'
I think its mostly PH burn and too much bloom nutes
They do smell fruity or some variation of that. Mine grew 24 inches tall even with LST. yes heres a tip, easy on the nutrients, and avoid overfeeding, use a fox farm soil and that should be a recipe for success