robzilla - 10:01 am on Jul 24, 2012 (gmt 0)
Only your primary e-mail address will receive notifications, unless perhaps you're changing any security settings.
Yes. Basically, you always log on to Google Accounts with your primary e-mail address, and this will log you in to all services connected to that (YouTube, Adsense, Adwords, Analytics, etc.) as well.