Not sure what you mean by that last sentence. But in the previous sentence you are simply stating that two events are simultaneous in one frame of reference. This means the interval between them is spacelike. Therefore they can occur in a different order in different frames of reference.Lets say the apple and the orange about are dropped and hit the ground simultaneously in one frame. Now lets freeze time.
Yes. There are also frames of reference where the orange is on the ground at the same time the apple is still in midair.Another frame the apple is on the ground but the orange is still midair. Another frame the apple is on the ground, but the orange has been on the ground for sometime. Is this the case?
But since the events have a spacelike separation it's impossible for observers on the apple to know whether or not the orange has yet landed, and vice-versa. In other words, the events are causally disconnected.
This is the reason why faster-than-light communication is unacceptable. Having it would mean an effect could precede its cause. No one can accept such a thing.