User blog comment:BobTheDoctor27/February 2013 Update/@comment-5918010-20130312000256/@comment-5918010-20130312042922

Well, his plans didn't go into effect until after Teridax was killed, so he was likely helping them to advance his own plans, which is one of those ways that the bad guys work, like how Teridax's plan required the Toa to revive and awaken Mata Nui.