No you're attempting to view this in a perspective of "time." Whatever decisions God makes have been made from the foundation of the earth. But the scripture goes even farther than that. It states that Jesus was the lamb who was slain from before the foundation of the earth. That means that in the eternal eyes of God, that event took place before the foundation of the earth, but in our perspective it only took place 2000 years ago. But we must remember that God dwells right now at the foundation of the earth and he concurrently dwells at the end of creation. Wherever we go or wherever we have been God is there.
Now "if" God chooses to answer your prayer, then his decision to answer that prayer was made in eternity and was in fact made before the foundation of the earth. But that doesn't mean that he is not answering that prayer in response to your prayer, does it? If he answers your prayer then he is in fact responding to something that you are doing. And if you didn't make that prayer, then he wouldn't have answered it, would he?
It's not leap frog. Its eternal reality. God is here. But God is also waiting for us in the future. He is there. He is everywhere.
You mouth the words but draw an absurd conclusion.
For whatever reasons God has desired, everything in existence has been detailed to the tiniest nano-particle from before time.
If you pray today, God has ordained that prayer and "answered" it already from before time.
That doesn't mean we shouldn't pray. Prayer is for our benefit, not God's. It's a gift from Him to help us clarify our faith and become closer to Him.
God doesn't send us post-cards or secret vibrations or psychic messages. He gives us prayer, wherein we can speak to Him and He to us.
And all the "if-thens" in the Bible are accurate, from our perspective. But nothing about God is conditional.
There's no "if" in God's vocabulary. There's only "is."