It does it mean...
- You give helpful feedback
- You give a good content
- You posted informative thread
- I like the information
- It gives me idea and curiosity
- I see that you are improving
Nice, this list is more inspiring

. But I also get what OP is pointing about. So whatever reason might be, whether the sender's hand slipped and merit the wrong member or not, as a receiver you must react properly. Learn to enjoy simple treats but don't appreciate it too much because it might lead you to wrong conclusions.
Also, know the difference of being
joyful and
boastful, receiving merits (especially from well known members) here doesn't give us the right to brag ourselves. Always choose to stay humble and kind.