I have 3 CIC tapes from the 1990s in my collection - two with 3xxxx catalogue numbers and trailer rolls before the film, and one with an RFM 1xxx catalogue number containing only the movie. Was the RFM version a rental version, or a promotional copy for film critics or something?
Without knowing any actual fact here, my guess would be the 3x cat numbers would have been excess rental copies. It was a common thing to have trailers preview a movie (and even some after) in Oz. It was less common on home video releases, but started to creep in in the 90's. (I'm only going off what I lived through).
Another thing to look at, is if CIC changed/mergered etc with other companies. have a look at the release dates of the films and see if 1 catalogue type comes chronologically before another.
Unfortunately I lost 98% of my VHS in an devestating cleaning accident (i had replaced most vhs on DVD by that time, and they all hit the bin), so I can't help with other cat numbers from CIC
Best of luck