First of all, there're more thing names that can cause confusion, one is (dynamic) Point Light (9800) which is named "Static Light", i.e. exactly the same as thing 1502; then (dynamic) Sector Point Light (9803) is named "Sector Static Light", although, I guess, its not static but dynamic (honestly saying, I could not make it work, so have no idea how it looks and works in game).
Secondly, there's a banal typo in the special 161 title: "Set secor contents" ('t' missing).