On fresh synchronisation - duplicated files

I’m synchronizing for the first time on this computer. The folder was empty, fresh installation.

I noticed that insync is uploading the file that has been just downloaded generating duplicated files.
Some files have been duplicated up to three times.

@Tontome: Apologies for the trouble. Please send your logs to support@insynchq.com for investigation: How to find the log files.

My troubles are gone now. Issue solved !

In fact, the drive was a ntfs file automounted at start-up. The computer is a dual-boot.
Previously the settings in the fstab file were :
/dev/sda5 /data ntfs defaults,umask=007,gid=46 0 0
The group was plugdev. The default group from the ubuntu installation.
And now is :
/dev/sda5 /data ntfs defaults,umask=007,gid=100,uid=1000 0 0
The user is me and the group is users. The group where the human users are listed.

Thank you for your help.