Original question being marked as duplicate of a question that should be duplicate
14629
Should I vote to close a duplicate question, even though it's much newer, and has more up to date answers?
33502
Remove Punctuation When Checking for Duplicate Titled Questions
113626
"Close as duplicate" - what if only the answer is a duplicate?
133887
Are questions closed as duplicates ever automatically deleted?
2091
What's the incentive to flag duplicates?
64472
Manual "Possible duplicate of" comments are wrongly removed when question is closed
18551
Duplicate questions in feed, and questions incorrectly marked as unanswered
104491
Single question thread with multiple questions, some duplicates
74028
"Duplicate of...[deleted post]"
87274
Should I downvote a duplicate question?
35162
Duplicate questions without answers
91474
Editing duplicate banner edited into the text of the question
139852
Dealing with suggested edits on question to be closed as duplicate
10293
How should duplicate questions be handled?
128880
"Marked as duplicate" text doesn't make sense for questions that have no answer
130608
Why can we flag/vote a question on Meta as duplicate of another question which has no accepted/upvoted answers?
78861
Why are there two separate boxes about duplicate questions?