However, Philo is not describing a created being but rather a divine manifestation of God's activity, functioning as an intermediary—not a literal creature.
Obviously the two are not mutually exclusive. Why can a divine manifestation not be a literal creature? That is a central tenet of Christianity, is it not? What is more, we know of at least one other example of a human being identifying as the Logos, Simon Magus. If the church Fathers are to believed Simon was believed to be the Logos and also claimed the Logos had taken human form throughout history.
Clearly many Christians had no difficulty bridging the Logos concept with literal beings. If Philo himself (or his Alexandrian school) did is much debated. He certainly seems to be open to the idea of the Great Angel or other manifestations of the Logos having been literal.