MAcro Choosing New Target?

I got this macro from here and I LOVE IT! But… it seems to autotarget after my initial targe is dead. How can I stop this? I would like to kill my initial target and not attack anything after it is dead.

Im on timeless isle and I will be attacking a Brilliant Windfeather and next thing I know… it dies and I am shooting one of his yellow friends… this is not so bad here but i do not want it to happen during a dungeon or raid situation.

How can I fix this macro to stop that?

/startattack
/petattack
/castsequence reset=target Serpent Sting,null
/castsequence reset=0.3 0,0,0,0,0,0,Kill Shot
/castsequence reset=0.3 0,0,0,0,0,A Murder of Crows
/castsequence reset=0.3 0,0,0,0,Bestial Wrath
/castsequence reset=0.3 0,0,0,Dire Beast
/castsequence reset=0.3 0,0,Glaive Toss
/castsequence reset=0.3 0,Kill Command
/castsequence reset=5 Arcane Shot,Cobra Shot,Arcane Shot,Arcane Shot,Cobra Shot,Arcane Shot,Arcane Shot,Cobra Shot,Arcane Shot,Cobra Shot,Arcane Shot,Cobra Shot,Focus Fire
/cast [combat] Rapid Fire

Oh by the way I am a 90 BM hunter

you auto target because of these 2 lines

/startattack
/petattack

just remove them and y6ou auto target no more