HELP! Campaigns are coming from contact owner in CRM, not from the defined sender in Campaigns!

HELP! Campaigns are coming from contact owner in CRM, not from the defined sender in Campaigns!

I have a mass email campaign going out to our CRM contact base that I created in Campaigns by setting up a sync. However, instead of each email coming from the user I have defined within the campaign, they are being sent by the contact owner in the CRM. 

Is this happening due to sync? Is there a button or option I need to deselect so this doesn't happen? 

We need these emails to come from 1 PERSON ONLY, and it should be the person we set up within the campaign. 

Thank you,
Julie