Bad experience with Gmail auto suggest Email address

So far in my all blogs, I have said positive things about Google... Now I had a bad experience sending Email from Gmail.....

My friend use to forward some of the Emails along with other people Email addresses.. What Gmail does is that all the frequent Email address listed in my inbox gets automatically saved in the Suggested contact list... It's a quiet good feature.... But as along as nothing wrong happened with it...

When my friend sending Email she also includes her other friends Email address.. lets say "Hello-1@hotmail.com" I got no idea about who is this "Hello-1" However, as one of the Gmail feature, since the "Hello-1@hotmail.com" appears so often in my inbox (which I got no clue because this id lists along with someother 15 more IDs...), it saved this address in my Suggested contact list.... But few months later, I got the friend in a similar name.. say... "Hello-2@gmail.com".. Since "Hello-2@gmail.com" is my friend, I added this in my Gmail chat list as well... After few days, I tried to send Email to my "Hello-2@gmail.com" friend from Gmail - Compose... but when I started typing "He...." it suggested me the Email address as "Hello-1@hotmail.com" I got no idea that this address been added to my Suggested email address... and assumed myself that this suggest list is from my Gmail chat contact list... and I got only one friend that the name starts in "Hello....." and continued sending the Email.....

Next day, I got reply saying... who is this???? Started wondering and realized something wrong has happened..... One of the Gmail good feature i.e., "Auto suggesting Email address" is not so good at least in my case.... :-( However, what surprised me is... it didn't show me the other id at all... the one that I have in my Gmail chat....