Terry asked me about this verse, wondering why the NIV 1984 was changed and made more confusing.
First of all, let me emphasize an unfortunately little known fact: the NIV has always been in a constant state of revision. It is part of the original charter of the CBT that we keep the NIV up-to-date. So we meet every summer for a week, going through suggested changes. Periodically, those revisions are published. (And before you ask, no, I do not know when the next revision will be published. Not for quite a while I would guess.)