Magma orb can't hit the same target with its second bounce when using lmp/gmp

I have been trying to make a magma orb knockback build, but a enemy can't be hit by another bounce when using lesser/greater multiple projectiles. Without lmp or gmp it works perfectly fine.

Chain might have another bug. The first and second bounce do hit, but I havent noticed that the thirth bounce made a hit. My build isn't advanced enough though to be sure, they might have been moved to much or one of the previous hits didn't bounce them back.

(EDIT: added example where the second bounce would have hit without lmp)
http://imgur.com/mvHkEhS

Greetings,

SpiritNrJ