Hi, Kim - this is a community forum.
Members reply to questions in a purely volunteer fashion. I'm sorry your questions have been overlooked thus far - it may be no one had anything to contribute. And yes, the site is intended for "anyone".
Do you promote the repeating field with the people you want to send email to? When you promote a repeating field, one option is to "merge" the information - that separates it with a semi-colon. Can you store the account ID instead of the display name? I'm wondering if SharePoint workflow may work with semicolon delimited account ids - I am pretty sure InfoPath Filler will resolve email addresses correctly with that, but not sure about ShP workflow... another option might be to use form logic to get the email addresses of users and promote that so you have it for your emails. You can use a double eval to concat a repeating field if needed, but since promoted properties already support merge, I don't think it will be necessary.