Board Thread:Questions and Answers/@comment-28265951-20160421125919/@comment-3423279-20160602044319

Those were probably because he didn't know how to utilize Time Remnants, so to his "current" self it looked like a ghost and Eobard tried to get him to not figure out how to use powers that would prove problematic for his goals.

Who knows, the writers might of gone either way but "Barry 2" should of been the one to survive while "Barry 1" sacrificed himself. Maybe the Speed Force prevents a time paradox for stuff like that, they didn't explain Barry and Hunter's usage of Time Remnants that well so who knows.