Apparently "toasted" sesame oil will get that dark. Apparently sesame oil also has a nutty smell - if you open one of the vials report back on the smell.
Some things that can be determined:
1. Heat was used to the point of darkening something
2. Any kind of heat is not necessary for trenE @200mg/ml
3. The process looks botched.
Again, I'd ask for a replacement. If appearances weren't important in this game then why would they spend all this time/energy creating fancy labels?