All of your email accounts will receive mail in the "messages" folder. I know it's a PITA. I don't even check the individual accounts anymore, just the messages folder. If I need to know where it was sent I scroll up, rather than down to see the "To" address.
I'm not sure why you're not getting audible alerts. Is your Profile set to Normal? If so, try pulling your battery for 30 seconds and see if that doesn't fix it. If that doesn't work...................I don't know. Someone will come along who does.
Best of luck to you.