Macro is Spamming spell part way through, can't figure out why.

Lazy Macros How To's
1

So i am doing some great dps with this macro, but i am running into an issue about 1 minute or so into the macro where it just spams immolate 5 or 6 times. It also happens when i tab to a new target sometimes.

What i want it to do is apply immolate when i first start the macro, and only reapply when i tab to another target as i tab every 16 seconds or after havoc is reapplied.

Any help with this would be greatly appreciated. Been banging my head against this all morning.

Sequences['Destro'] = {
author="Sørrows@Daggerspine",
specID=267,
version=10,
source = "Local",
helpTxt = "No Help Information",
StepFunction = GSStaticPriority,
icon='INV_MISC_QUESTIONMARK',
lang="enUS",
PreMacro=[[
/targetenemy [noharm][dead]
/castsequence [combat] reset=target  Immolate, null
]],
"/cast [nochanneling] Conflagrate",
"/cast [nochanneling] Chaos Bolt",
"/cast [combat,nochanneling] Dimensional Rift",
"/castsequence [nochanneling] Incinerate, Incinerate, Incinerate, Havoc, Immolate",
"/cast [nochanneling] Chaos Bolt",
PostMacro=[[
]],
}