I flagged this post as "needs details or clarity"; my flag was declined, while the question was closed as such.
Am I missing something?
This is a side-effect of leaving the question open, which will decline the flag.
Following the timeline:
Considering the moderator's comment,
I think the question needs more detail before we can tell if it is a duplicate or not.
I think the moderator was worried if the question would still be closed as a duplicate instead of "needs details or clarity". Possibly a confusion, but I believe there was no harmful intent.