Syncing creates duplicates

[Jalcorn]

Hi,
When I sync MMA with MMW, it appears everything transfers to my device. However in the library on MMW, there duplicates created of some tracks. Any idea why this happens and how I can stop it from happening in future?

TIA

[Lowlander]

Do you have Sync from device to PC enabled?

[Jalcorn]

I think so. Is this the issue, should I disable and only have PC to device?