One thing has always bugged me about AEC. I never saw all the way to the end of Energon, but it doesn't make any sense how in Energon the Autobot's are on Earth working with Humans then at the start of Cybertron the Autobot's have never been to Earth.

Because of that I always assumed Cybertron was a standalone story like RID, but according to this page on TFwiki I found the other day I am wrong. So how are the two stories in the same continuity?