Time itself can not be a fixed as they are assuming, for even Dr Who shows to us that changing history either creates alternate timelines, or else simply cannot be done!
When they do something to create the alternate timeline, should not really be affecting them, but alternate themselves!
First of all Flash and Dr WHO are different shows with different writers and rules!
Second, perhaps you should go back and recheck the history of the batman board and refresh yourself on the fact that IMU 007 once upon a time told you that you have no business with him on the boards.
Seriously the boards were fun to lurk around and read during summer but once again the fall season brings you back with your inane posts and poor grammar.