The post explains well that you get the curious badge when you have a positive question record:
A positive question record means you don't have too many closed, downvoted or deleted questions, overall. The formula is (total questions - negative questions - closed - deleted)/total questions >= 0.5. Questions that have been downvoted and closed and deleted count three times in this calculation!
(total questions - negative questions - closed - early deleted)/total questions >= 0.5
Whereas early deleted refers to questions deleted in less than 60 days.
It is good to mention that that the early deleted questions page refer to questions deleted over the past 60 days:
Answers tabs that'll list the given user's deleted questions or answers, currently limited to those posted in the past 60 days.
So, if you do the math:
(23 - 6 - 3 - 0)/23 = 0.6 > 0.5
Also, it is obvious that the other requirement is met (Ask on separate days):
So, why am I not being awarded the curious badge?