[Defraggler is moving thousands of small files to the end of the disk]

I would also like to know how to redo this. Shall I initiate another defrag without selecting the option to move large files to the end of the drive?

[Defraggler is moving thousands of small files to the end of the disk]

My computer is used for Music Production. Therefore, I have hundreds of thousands of small audio files at my hard drive.
 

I have selected the option to move files larger than 500 MB to the end of the drive, with the options as in the attached picture.

However, Defraggler is moving all my tiny MIDI files that are smaller than 1K, and also small WAV and FLAC audio sample files to the end of the drive.

These files are, precisely, the ones that I need to access at optimum speed, so they better are at the beginning of the drive.
 

What could have gone wrong?

I am using Defraggler 2.22.995 64-bit