Sync does not start at the first file in the compare list

[masterjp]

I have a directory on internal harddisc and want to copy it with FreeFileSync to another external harddisc.
The directories and files are sorted by absolut path in alphabetic order.
I wanted to copy them to the new external harddisc.
So I started the sync job and it looks fine.
Because the job takes much time, I stopped it after the half of processing time. On the next day I wanted to continue the Sync job.
I compared both directories again, the file list looks correct und start the job.

FreeFileSync does not start at the first missing folder and file.
It started with a foldername and file which was not at the begin of the list. Why does FreeFileSync could not copy the folder and files in alphabetic order, if I continue a sync job?

Does it use special copy methos to optimize sync speed?

[Plerry]

The sorting method you apply to the Compare results does not affect the syncing sequence.