Note that difference in that '89 article occurs between the original magazine and the Bound Volume..... not between the Bound Volume and the WTLiB.
If I was a JW and some Big Scary Apostate accused the WT of altering the text on the WTLiB, I would immediately challenge them to prove it, knowing full well that the WTLiB always reflects the latest printed edition and the BSA has just handed me his arse on a plate.