[Star]

My suspicions were raised when I saw multiple breaks which were through plain stone walls, or where you turned and ran straight into diamond.
Piece 1: You dug straight through to where there was diamond (shown via rollback), which you would not have come across had you been strip mining, as shown here:



Piece 2: You covered gold you found, again, when you dug through an otherwise plain stone wall, shown here:



Piece 3:  The tunnel turned and ended in redstone and diamond (shown via rollback)



Piece 4: Tunneling down to bedrock, turning straight into diamond (shown via rollback)



Is it possible someone else has access to your account that you didn't know about? The mining without torches is understandable, I do that myself.