Thread:Feedback/Watchlist (2)

Why is my watchlist being filled with entries like:

Thread:Feedback/Stopping bad signatures? Thread:Feedback/Stopping bad signatures?/FT2 Thread:Feedback/Stopping bad signatures?/FT2 (2)

Seems redundant - intuitively there aren't subthreads with titles "/FT2" for example, so I can't be watching them.