I have a collection called "Greek Search Collection" that I use regularly. It is made up of the NA27, LXX, Apostolic Fathers:Greek Texts (Holmes), and Philo:Greek w/ morphology (all using Logos morphology). I've noticed recently that when running a morphological search on the collection, it will always return hits from the NA27 and LXX, but never from Philo or the Apostolic Fathers. Running a search just on one of the other two texts alone works fine. Also, putting Philo and AF together in a collection causes 0 hits.