Managing message overload?

EMail :

- When an email arrives I get an entry in my Inbox and in my Messages - why? It seems I only have to deal with it in one place, but can I set it so I don't get notified in both areas?

Voice call :

- If there's a message left I get an SMS and the vmail icon at the top of my screen comes on - duplication. To clear the SMS I have to open the SMS app and read or delete the message. Then I have to call my vmail inbox as well - duplication. Is there any way to get rid of the SMS notification? Just the icon would be adequate.

TIA - R.

I don't think you can. Maybe with Visual voicemail?