I create a number of library items to create parts assemblies..

I will build a component in a drawing that has other components in its own layer then isolate the component and only select it. I then use Block->Create Library Item to create a component, set it origin and save the item.. When I open the item, there apears to be a set of duplicate lines generated. I have to select all the components and do a detect duplicates then delete them before doing anything else with the drawing.. I found this issue by trying to create a cutaway view then adding a crosshatch. The crosshatch tool does not like lines on top of lines..