Publishing results in two windows; why?

RapidWeaver Classic
1

And both windows tell me that the file was published - and I can either close the pop up or visit my site. But, why have two windows with identical functionality?

2

For the notification in the upper right corner, you can turn that off in the Notifications settings in System Preferences.

Screen Shot 2015-07-17 at 5.18.34 PM.png780×640 134 KB

3

Excellent - thank you.
Brian