Fotostream problems with Aperture library

Hi all,

I have the problem that Aperture always doubles a lot of my existing projects (e.g. 2011 XYZ(1)) with a few pictures that are already part of the existing project (e.g. 2011 XYZ).

Obviously I made the mistake in the past and stored pictures out of the fotostream folders into the project.

I have now deactivated fotostream on all of our clients and deleted the fotostream main folder on the iMac. But whenever I activate fotostream on the iMac still it doubles again the projects.

Question: Is there any chance to reset the fotostream?