It's clearly just for curiosity's sake, and I personally am for that. Who said anything about it being strange or wrong that they did change? What's your angle?
Also, certainly something interesting:
“All I can tell you is the story as I have always read and understood it. The Toa were told to go out and collect six Great Masks a piece. Once that was done, they would get their Gold Masks. That has been repeated multiple times in multiple places. Obviously, the folks doing the movies chose to interpret the story differently. I'm not saying they are wrong and you should ignore the movie, I am simply saying that is not how I understand the saga. I could certainly be wrong, and I know it has been established pre-gold mask that the Toa made use of Noble Mask powers. But here is what I wonder -- there are six Noble Masks per koro, one of which is being worn by the Turaga. So if Tahu decides he needs to call on the Mask of Concealment, what happens? Vakama is wearing it. That is part of the reason I always tried to avoid the 'Toa using Noble Masks" issue in my stories. The other reason is that it would have made the initial story even more complicated if the emphasis was that the Toa had to collect 12 masks before they could progress -- I did not have room in the comics to collect Great and Noble Masks.”
Always wondered about the Noble masks. Stuff like that was preeeetty sketchy back then.