Assembly "saved from" listed in check in/out?

Hi all.... I created a couple of assemblies using "save as", didn't save or check them in until I had all the necessary parts switched out. Now when I go to check the new assemblies in/out the one I created them from is listed. Has anyone else seen this? Is it normal? Seems odd to me since it is not used anywhere and I don't see this behavior with any other assemblies I have created in this manner. Also, It doesn't show up when I change states which it would if it were somehow linked to the new assemblies without my knowing. So confused.... Thanks!