Any idea why Pocketmac is duping my Entourage notes?

I have it on one way each time just in case and this is what happens? I keep having to purge the notes on the device and then sync it again - but every time I try and sync all 268 notes again, it sync fine when I set it to overwrite.

Then I set it to two way sync and yet again, it bumps the amount of notes to 409.

any idea of why this might be happening.

Just going to purge the notes again........ for the 10th time!