An order of magnitude is 10x, this is 6x so within an order of magnitude. Specific numbers are meaningless. Calling it same order of magnitude seems an unfortunate (and technically incorrect) phrasing.
Still, the point stands - a 6x difference between normally-served dose and a harmful one is way too small to call it non-harmful. How do you even define a normally-served dose? This needs further clarification with better definitions.