Posted Feb 06 2012 - 07:23 PM
The problem is, we have no other evidence that there were Air Glatorian to get mixed up with Jungle (besides the power they got). For example, there was no Element Lord of Air, just Jungle (who is confirmed to control plants), so as far as we know there were no Air Glatorian to get mixed in.
It seems likely to me that elemental ability can be distinct from element type, just as in MU physics; there is elementally neutral "Toa Energy" which is the same in all Toa, and then there is "elemental energy" which is different.
This would also be similar to Element Swaps in the fanon Expanded Multiverse; there we established that Matoran, Toa, Glatorian, Agori, etc. can all change elemental energy association, without affecting whether or not they have elemental power (and this seems canonically plausible). So a Toa of Ice like one of our main characters can swap elements to a Toa of Sonics, and still remain a Toa with elemental powers.
In this case the Ignika would be what changed the elemental association, probably due to mixing them up.
Also, it isn't surprising according to the color-mixup logic that red was given fire, or blue given water, since those are the same in the MU. What I'm curious about is Sand and Rock, since those are different too. I don't recall an answer on those off the top of my head.