Mail notifications

I'm having LOTS of issues with mail. Messages appearing twice, exchange mail not syncing between devices, general incorrecrt operation (blank lines in message list, when deletying email it doesn't go to next message) as well as notification issues. In generasl mail has almost become unusable. I have reported all of these problems.

Same here, no notifications upon receiving new mail on any of my accounts (pop3, imap, exchange).

Submitted feedback to Apple