Clusters overlap: why? And how to get rid?

[Bernd Welter]

I am playing with some cluster scenarios and encounter strange unexpected results. Looks like this is related to the fact that my 5 input cluster coordinates are located on the same (x,y).
Why does this happen?
How can I get rid of this?

[Bernd Welter]

If all cluster center coordinates are equal it could at least help to drift them away a few hundred meter into different directions