Complete world recreation in hardcore

Tonight, when I created the world, I set the seed to "SURPRISE MOTHER FUCKER" and named the world "DO NOT PLAY". Over a year ago I made another hardcore world, with the same exact name, but a DIFFERENT seed. And now it was completely remade, with everything I built, and all of the items in the chests I placed, all of the wheat at the same stage is was when it was growing. Everything was identical, with the exception of the items I was carrying, they were gone. The older world was created on version 1.2.5, and my current version is 1.6.2.

What I expected to happen was...:
To create a new hardcore world named "DO NOT PLAY". With a seed of "SURPRISE MOTHER FUCKER".

What actually happened was...:
A level I created over a year ago, many updates ago, was completely remade, exactly the way it was when I died. I was standing in the same spot. The only thing that was missing were the items I had when I died. The picture I attached is what I just took, and nothing is different.

Steps to Reproduce:
1. Honestly I don't think you can reproduce it, but it's really weird.
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