I created an assembly with some structual members from the design center that I modified and were "saved as" inside of the folder all the other parts are in (including the assembly) and when i go to reopen the assembly, the parts I pulled form the design center are not the modfied parts I created, they are the ones from which they were created. Why is this happening? Is there a way I can get the assembly to reference the correct parts I created?

Thank You