Limit maximum operations running simultaneously

When copying from network, tasks aren't sequentially, they start all immediately, even when "Limit maximum operations running simultaneously" is set to 1:

Example:
First task:
From \\PC-1\FolderA*.* to G:\FolderA
Second task:
From \\PC-1\FolderB\file1.ext to G:\FolderB
Third task:
From \\PC-1\FolderC\file2.ext to G:\FolderB