I'm sorry your contact file won't upload! You'll first want to make sure your file is formatted for Constant Contact. If you're still having issues, please feel free to send us an email to
social_support(at)constantcontact(dot)com and include your username, a reference to this post and attach the file so we can further investigate.
In addition, I'm not sure why your groups aren't in alphabetical order as it may be how they're organized in that particular email client. You might find this reference to adding contacts from Google helpful!