Several email addresses. Any email sent one shows up in all of them.

I have several email addresses on eMClient. Every time I receive an email to one of my accounts the same email shows up in all of my accounts. If I delete any of the multiple emails in the All Boxes folder, all of them are deleted. Are there any settings I need to make to stop this? Or is a bug that cannot be fixed?

It could be that you have some data corruption. If you are on version 7.x, close eM Client and run C:\Program Files (x86)\eM Client\DbRepair.exe

Or is it possible that you have setup the same account more than once?