How to avoid unwanted results from Botox for Migraine (temporalis wasting and asymmetry)?

Insurance is covering Botox for migraine done by my neurologist. I mentioned above concerns before getting 2nd round and he said he'd avoid the temporalis and that he'd go higher (B/c short forehead) but the same issues reoccurred. This time he gave me injections for my 11's, forehead line, and crows feet. Which one is the culprit for the temporalis? Also what to do about the eyebrow droop? (I suspect natural lower tone on that side b/c of the pre injection asymmetry of forehead line) TY!