I have some contacts that have two email addresses and want group emails to go to both of them. Is there a way to setup one contact so that group emails will go to two different email addresses, or will I just have to create another contact for them?
You can change the main email address of a contact to contain multiple addresses.
Create a Group (look under Contacts). Create 2 contacts for the 2 addresses, and add them both to the group. When emailing, rather than emailing the contact, email to the group.
It would be easiest to set up another contact with the second mail address. By default the email will only be sent to one of the contact mail addresses.