Duplicated Links

I noticed that it's possible to bookmark the same URL multiple times within a set. I can't image there is any reason why someone would want to do this on purpose so I figure that this is just something that has been overlooked.

It would be nice for you to report an error or just ignore it if you accidentally added the same URL again to the same set. The issue as I see it is that over time you won't know what is in a particular set and I would guess that it's highly likely you would accidentally add the same URL again. Please let me know how soon you might be able to resolve this issue. Thanks in advance for your consideration!