Seeds of Corruption Wipe

Last night in TK I accidentally wiped the raid by casting Seeds of Corruption. A couple of questions: 1) This is only a problem in TK correct?; 2) What spells are okay to to use in TK?

I was told by the other warlocks to just spam shadow bolt, but it remains unclear to me why the other warlocks were still able to use Corruption, Immolate, and Curse of Agony.

dont use AOE spells, attack target same as tanks one, dont attack trash that got more then 93% hp,

i was using corrupction, immolate, curse of agony, siphon life, unstable affliction and drain life, coz im fucking great and dont steal agro ever if u got omen and watch it, u can do well if not, just stick to things i wriited at the begining

hahhahahah /FART