Simplenote sync duplicating notes

Also have another problem now with simplenote. The first sync work beautifully but once I repeat the sync the notes are not sync but duplicated from simplenote server.

Could you please post the circumstances surrounding this case? I cannot duplicate it using a simple test of syncing five files up from a new project, using the keyword “DuplicationTest”, and then syncing again. I only get one set of files on the Simplenote server. Try to think of everything you are doing, including where the documents are being edited before you sync, what devices you are using, third-party applications if any, title names, sync token.