I have noticed that I have links showing up at the bottom of the Detail View that I didn't add there.
Is there some other function in Domo that is doing this automatically?
The only thing I can think of is that when I duplicate a card using the Save As function, is that what's making them show up as a Linked card?
From my experience, the linked cards are showing up because you used the Save As feature to create a new card. If you want to remove a card from being linked, you can hover over it in the list of linked cards and click on the trash can in top-right corner of the card.