Why was my post merged?

A few minutes before I created this post, I saw that one of my posts was merged into another one which was asking the same question. I created my own version of this post to try and find some answers that were not shown in the other one. However, less than a day later my post was merged into another one without my consent and without me being notified. I am writing this post to ask why it was merged. If you guys can give me some answers, then that would be great.

P.S. If I recreate the post that was merged, DO NOT merge it into the other post again!

P.P.S. Does anyone know how to enable or disable the “Allow Reuse” option?

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