I am sending email from Outlook.com, using Google Chrome, on a Windows 7 machine. To select recipients, I type the name of a group I have created (like, "Softball Team") and pick it from the list. However, after I send the email, I discover that it has been sent to several of my contacts who are NOT members of the Softball Team group. It has happened with more than one group.

Any idea what is causing this? Yes, I have reviewed the list fully (and in one case deleted and recreated the list) and I know the people getting the email are not members of the group.

This is extremely frustrating.
Thanks
Bob Grinsell