You shouldn't try to bend or LST small seedlings. If you plant is only 11 days old you jumped the gun bigtime here. LST and bending of limbs are usually done further down the road when the plant begins vigorous vegetative growth.

You need to find a way to prop your plants up straight before they do die. Use a bent paperclip or a long twistie tie or something but get those babies back to straight up for another month or so before you mess with it again.