I have a question on meta (that was migrated from the main Q&A). Originally, the question got a score of 4. Then it was closed as a duplicate, and shortly, it had a score of -4, and the question currently has a score of -6. Same thing happened to this question. It got a score of 1, later closed as duplicate, and a while later, got a score of -8.
Because of this pattern of downvotes after the questions were closed as duplicates, it makes me wonder, Are my questions downvoted just because they are duplicates? If so, is there something in meta that tells people to downvote duplicate questions?