Hello,
/auto_close will be ignored if an error occurred.
/force_close always close even if an error occurred.
Perhaps, WriteReparsePoint error means "Can't create a symbolic link".
Only administrator can create symbolick links in default windows configuration.
So I recommend to use FastCopy as Admistrators privilege, if you want to prevent "WriteReparsePoint" errors.
By the way, it is a strange behavior that second FastCopy didn't start when first FastCopy was finished.
FastCopy acquires source/dest resources(HDD) for copy at starting.
If previous FastCopy has acquired these resources, next FastCopy will wait for acquiring.
But previous FastCopy shows "Finished" status, it will release these resource even if previous FastCopy window still opened.
Maybe another cause exists. Otherwise, FastCopy's bug :-)