Give the JWs a little slack. It must be very difficult for them to read conflicting "truths" between what the Bible actually says and what the Watchtower magazine actually teaches.
It is only to be expected that the official JW bible would be revised and constantly updated to fit in with the new light published in the Watchtower magazine.
Keep in mind the publishing precedent set by the Watchtower magazine in reducing the number of pages and volume of words printed, of which was then adopted into the bible by reducing the number of pages and volume of words printed in the bible, which then set the scriptural precedent to justify the previous reduction of the Watchtower magazine.
These changes to the bible were prophecied in the bible in the revised version of the prophecy which stated "the light gets brighter".