In one off color "Tonight Show" monologue, Johnny Carson fictitiously referred to the titles in the series as, "What Katy Did", "What Katy Did Next", and "Son of Katy"!
When Elsie wakes up in the night and walks across the hall, having heard Katy fall, her hair is clearly in braids. When she enters Katy's room her hair is loose, even though only a few seconds have passed.