I think what Eunny Jang meant by reversible was the front and backs are the same so that you could wear them on either hand, not inside out. :)
Yes, I agree with Clare. Although not well defined in the sentence, I too at first would think like you ie reversible = same inside and outside. Perhaps saying interchangeable rather than reversible would have clarified. btw, yours looks lovely and you have tempted me to try colorwork!