Why Is this the puzzle of the Day?

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Calebaleb12

So, I solved the puzzle of the day for Apr 6 and I found a faster checkmate. (See analysis below) Why would the puzzle not be the faster mate?

Calebaleb12

I do not no if it is correct category, but I just put it here

rsmab1

They would play Bxc8 instead of Kf7

Calebaleb12

oh, yeah, ok