Whats even more confusing, is when I double-click on users I used to use to g-chat to, it pulls up the message and I end up e-mailing them instead of messaging

Whats even more confusing, is when I double-click on users I used to use to g-chat to, it pulls up the message and I end up e-mailing them instead of messaging them. This is easier to do now that the e-mail window looks like a chat window. I've noticed others doing this as well. They e-mail me without a subject and its context is from a recent chat.