Spoiler Thread: Avengers Infinity War

I figured I would just ask this here but I was wondering if someone could clarify something for me. In the second Thor movie Odin says that Malekeith created the Aether but not only did the Collector say it was the big bang happening so did Wong in Infinity War. So did they decide to change the history of the Reality Stone after they settled on what they were doing in the future movies or is there something I'm missing?