Cannot see item type parts already created

Hello, I am new to aras and just blind testing the application. I have created several users, added a few fields in the item type part and edited its form. Test create a part, saved and done. When i went back to the part search page which defaults all items, its not showing. However when i try to add the same item id to a new part its showing a duplicate already exists. I can add this part that i created to my model but cannot search for it or access it anywhere else. can anyone help me ?

thanks so much.