Buff time left target problems with multiple warlock in raid

Hello, i don't know how to solve my problem with warlock buffs, when im testing this rotation with no other warlock attacking these same target as me everything works fine. Problem appears when im not the only one affliction warlock casting these same spells on target. I think condition "Buff time left target" check only if any of buff for example Agony time is correct. It doesnt check if this buff is casted by me, it can be casted by any warlock attacking this same target. How to solve this problem. Do u have any ideas? 

Affliction Warlock.xml