New template emails delivered to promotions tab

After five years of using the same template, I decided to try a new template for our email/newsletter. Upon testing, the new template is going to Promotions.  Whereas, re-testing with our previous template, the email goes to Primary.  FYI, we do send a welcome email to show folks how to move us to Primary.  This new template is the anomaly. Are we destined to only use one template with CC so we remain in Primary?