I remember encountering several of these at the start of Van Vogt's sci-fi classic World of Null-A. I couldn't figure out if it was deliberate in any way, or just an annoying accident.
It's said that van Vogt would sometimes rely on unconscious processing and "dream logic" (for want of a better term) in his writing processes, so those sentences you noticed might well have been both "accidental" and unconsciously intentional.