As Kev mentions, there can be a spot within a spot. I have had rods very close to each other, yet one rod produced all the action, again the left hand rod from 3.
The left rod was cast to a showing fish, the middle around 2/3 metres away. It was only the left hand rod that produced 4 carp, nothing on the others.
I've seen carp entering an area, always coming in from a particular direction. If you create a baited area it would be the first rod they come to that produced, take that away the next in the line would go as they worked along.
Not every water, or even swim is the same.
On Brackens, a swim named Suicide, the gravel bar threequarters across, fish came up the bar anywhere along from the weed and trough behind it. Yet the margins to the left, the fish always swam along the margin (when an angler was in the swim) from the left, never from the right.
On the Central, if you were lucky enough to get multiple takes (a rarity), the fish tended to work their way along the main bars from the North or South. The first rod they found was what you got takes on. Even though the South was joined to the Central, there was no pattern as to where the fish approached from, and it was the same fish able to swim through both lakes.