New local file removed then added if Real-Time Sync

[PowerUser]

A new local file is removed after copy to remote, when Real-Time-Sync is activiated on Schedule. Later the file is copied back to local.

Is this a bug?

If a file is added at remote side, the file is not deleted.
If Real-Time-Sync is unchecked and shedule every 1 sec activated, a new local file is not deleted.

BestSync 2013 8.0.6.3 Ultimate
Local (Folder1): Windows 2008, NTFS
Remote (Folder2): ftp, CentOS 6.2

See attached Task file for Settings (some fields are anonymized)

[RiseFly]

This symptom is possible if the FTP server does not support MLSD command.
For this kind of FTP server, please do not use the real-time sync option.

[PowerUser]

Thanks. I will use shedule mode.

For your information, it seems the FTP Server does MLSD. Protocol Information taken from WinSCP, connected with same credentials:

Remote system = UNIX Type: L8
Session protocol = FTP
Compression = No
------------------------------------------------------------
Can change permissions = Yes
Can change owner/group = No
Can execute arbitrary command = Protocol commands only
Can create symlink/hardlink = No/No
Can lookup user groups = No
Can duplicate remote files = No
Can check available space = No
Can calculate file checksum = No
Native text (ASCII) mode transfers = No
------------------------------------------------------------
Additional information
The server supports these FTP additional features:
MDTM
MFMT
TVFS
UTF8
AUTH TLS
MFF modify;UNIX.group;UNIX.mode;
MLST modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.mode*;UNIX.owner*;
LANG en-US*
PBSZ
PROT
REST STREAM
SIZE