I received an achievement twice
65844
Duplicate yearling achievement in notification
89351
du gives two different results for the same file
77940
Achievement messages in top bar are being double-HTML-encoded
100941
Synchronising twice on the same object?
120508
Why does the introduced part-title in letter appear twice?
49659
Can you take the same feat multiple times?
90310
Database DML method executes twice in any record has been failed
35742
Duplicate notifications
1893
Once I got a new achievement, design of the activity tab is weird
40958
Question appears multiple times in a search result with Q : and A :
54043
Achievements menu: Can you tell me why I got reputation?
100092
Problems with certain times occuring twice (or not at all) on night of daylight saving time to standard time transition
25468
Is there a case where including the same header twice is actually helpful?
136533
Object appears twice when linking it to a collection
121836
A better answer was posted long after accepting another. Should I accept the new one?
88417
Tag badges are re-awarded for some users
72930
Removed post gives me -2 reputation. What happened?