No thats a question thats been already asked many different threads ago. I read that the writers started at the end of the story and wrote their way back to the begining. My theory is that with all the havok in the direction of plots and reshoots. They lost track of the sequence of events going front to back. It makes no sense starting with seven signals on the 1st episode. Then they say that a new signal has just appeared then after a few episodes they start saying that the third of seven and the fourth of seventh signal has just appeared. If you start with seven and then seven more appear, that equals 14 total. The plots of this show defies any logic. But hey the production values and the cast relationships are like no other.