Well, I asked the vendor about the milky vial and this is how they responded. Let me know it this sounds legit or BS
"Dear Sir,
I guess i understand your problem. There can be chemical sedimentation
when the vials on shipping. As you may know that benzyl alcohol is
used for sterilization and this atoms sometimes can interrupten each
other and nailed down. This doesn't mean that vial can be useless.
Before inject it, shake it very well and use it. There will be no harm
for you. (May be little bit sour after the injection)
"