ICEM: explaining why you might see multiple curves in same location.
Originally Posted by PSYMN
For the curves, turn on color by count... If you see yellow curves between two surfaces, then they are each single edge curves and you probably have two... Build topology will remove the duplicate if your tolerance is sufficient. This will also change the curve color by count to red, meaning a single curve is between those surfaces.
As for deleting curves, it really just makes them dormant. When you