Hello my friend,
From time to time, you can raise your plants that are lagging a bit so they don't fall behind or get overshadowed by the others during the stretch. I just used wooden boxes for that. It's pretty normal for them to separate from each other during the stretch, especially with different strains. At the end of the stretch, you can also bend individual shoots that have shot up too high so they "lie" at the height of the other top shoots, preferably somewhere there's space, otherwise it gets all tangled. And always tie down the tip well after bending/supercropping, otherwise it just grows back up.
Best regards and good luck with it!👍