wrong thread
Ok, this was the wrong thread. Wont happen again.
Yes, I always get problems like that with vectors in Blender: keep importing vectors in the same session simply messes the scene up. I usually fix that editing the curves in Blender.
Enter in edit mode (press TAB), select one of the vertex for the unwanted curve, press L to select all the connected vertex and delete them. If pressing L selects also vertex from the right curve, then deselect everything and select another point, until you get the proper connected vertex selected.
Hope this helps.