plants are getting too tall, so i lst the tops, but now they curved up towards light again and grew more... so can i lst the same branches twice or should i just clip them or any other ideas?
Yes, it's expected that the top will turn back to the light and continue to grow up, at which point you can tie the new growth down and continue as you need in order to fill out your canopy.
Yes once they straighten back up and grow 1 or 2 more nodes up you should bend it back down and repeat
so what do i do when i run out of room at canopy level.. i have two plants under a 400w and i cant raise the light ive lst'd like every branch multiple times now, and its getting seriously crowded under the light, can i just lst them outside the light if i run out of room. it was hard just getting them to fit the last time. i dont really see any other options?
Just keep weaving them through each other, make it look like a roller coaster in there! There's always more room, got a pic?