Sent mail going to trash not sent mail folder

Just lately my sent mail has started being placed into the trash folder in em client, it is filed in the sent folder on Gmail correctly. If I move the sent mail from trash to sent folder on em client then I get duplicates on Gmail. Any pointers would be appreciated?

This may be due to the auto-save feature in eM Client.  Emails being composed are saved every so often based on the setting in menu/tools/settings/mail/compose (Automatically save email drafts every x minutes).  When the email is sent, the saved draft ends up in the trash folder.