Jesus concealing his identity

In Mark 8 and Matthew 16 after the feeding of the four thousand Peter declares Jesus as the messiah. Immediately after this Jesus tells his disciples not to reveal his identity. How does this reconcile with how in John 6:40 Jesus reveals himself to Jews in the feeding of the five thousand which **occurs before** the feeding of the four thousand? Even more problematic is how Jesus tells the Jewish authorities in Jerusalem that they search the scriptures for eternal life, when in actuality they speak of Jesus. **This event occurs even before the feeding of the five thousand in John 5:39.**