Wrong extents in Spyplot reader and corresponding in the AMR filters.
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
In vtkAMRDualContour.cxx each reference to GetExtents(extent) is immediately followed by --extent; --extent; --extent;
This appears to be due to the Spyplot reader always passing the dimensions as the higher value instead of dimensions - 1.
There is code to select between dimensions-1 and dimensions as the upper extent. I think this should instead be dimensions-2 and dimensions-1 and then vtkAMRDualContour should no longer decrement.