BuddyPress.org

Hello, i am having problems, I already talk to my server and to my theme creator, and they say the problem is the plugin. I have the last version 2.6.1.1 My problemas are:
1. When user register, he is not receiving activation/confirmation email
2. I am not receiving orders email on my email
3. Plugins are having a lot of updates and system is not informing me

Clase help me, is very frustrating, I am loosing sales.