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That is not a bug. you have it twice because you likely migrated your site a few times while selecting the "copy" option from the Advanced Translation Editor Migration banner.
At some point you migrated that site back and selected the "move" option instead and that created what seems to be a double URL. the best way to see this is as if it was a container of translation memory. each one will have the content from one instance of your migration.
I can hide them and leave only one (It will be done by the time you read this) but if you keep migrating back and forth they might appear again, they are not a bug or anything and will not create any problems on your end.