Well then you got the wrong message. A glass of wine can contain over 50mg of methanol. If something's at or below the FDA reference dose, it's not worth worrying about. The FDA is rather risk-averse and tends to set limits far below what would actually cause harm.
To give you another bit of data: The metabolite of methanol that actually causes damage (formic acid) is a common food additive and is naturally present in many fruits, honey, and of course ant venom. If tiny amounts caused issues, we'd know by now.
Is it possible that the aspartame hydrolizes in our guts after we drank it? "Disgusting drink check" wouldn't help then.