pb with GORDON surfaces

 From:  Frenchy Pilou (PILOU)
hi lorem
Something i don't understand : your curves are not "jointed" at the intersection and even not attach at the sides!!!
Is that normal?

Despite of that Gordon works fine :) Separate the entiere object; kill the half et voila :)
Is beautiful that please without concept!
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EDITED: 11 Dec 2007 by PILOU