I have joined http://electronics.stackexchange.com about 4 days ago. After joining the next day I edited this post. As you can see it was being approved and I got 2 reputation points as normal rule applies. Now this post was about a year and 6 months old so I should be awarded the badge
Edited first post that was inactive for 6 months. I thought it might take time to award such badge, but as you can see it's been 3 days passed but still I haven't got this badge, is it a bug or misunderstanding of mine?
I have already read this question, titled How long does it take for badges to be awarded? How are they generated?