Walking on the Water Question

First, Mark 6:53 or so, says they went to Gennesarat after Jesus came to the boat, even though they at first were going to Bethsaida. So Matt. and Mark agree.

If I remember correctly, Gennesarat is a region, not a city. So one or more of these cities could be part of that region.

John does not write in chronological order, as the other gospels appear to do. We know the gospels record two mass feedings (5000 and 4000). It could be John is simply recording a different event.

We also see different responses from the disciples. In one case they are frightened and unsure of who Jesus is. In another, they declare Him to be the Son of God. The latter could reflect a similar but separate event that came late in His ministry.

Hope this helps.

Peace to you