Ended up calling Stoner today since I was bored at work. Guy on the phone said they use to put the expiration date on the cans because retails stores required it, now they don't so they stopped. When I told him the date he said they stand behind their product and are certain it's still good and it's shelf life is fine.
Maybe I had tough tar and bugs on, I'll give it another try to see my thoughts on it.