Now there is a discussion on who the names of the guys who merit a post are sorted.
Hope you can reveal the mystery.
Why is the creation date of the bitcointalk account an important factor?
I don't think it's important, it's probably an arbitrary choice.
Trust settings uses the same order. From a programmer's perspective it makes sense to just sort the (user) numbers.
So if your account is older than mine but we send the same amount of merits for the same post, your name would appear before before mine every time?
Correct
By "oldest account first", LoyceV tried to mean the account which merited the post first followed by the subsequent accounts meriting the same amount of merits.
No, that's not what I meant. It's also not how it's sorted.
I guess then your facts are wrong atleast for this post -
Jammu & Kashmir Special Status (Article 370) Ends!! 
As you can see, both
nutildah and
Totscha have given 2 merits each to the post.
nutildah is a legendary member and registered on April 19, 2014. He merited the said post on Aug 7, 2019 07:07:08 AM
Totscha is a hero member but registered on Sep 12, 2013. He merited the said post on Aug 7, 2019 07:10:40 AM
Of the two, Totscha's account is the oldest. If its sorted by oldest first, Totscha's name should be shown before nutildah. But thats not the case here.
So I think it's sorted based on the time of giving merit. Edit: not sure how it's sorted, maybe DdmrDdmr will update
here 
