Do not allow changes to Mailchimp database to affect Bloomerang database

I recently pushed data from Bloomerang to my Mailchimp account so that I could have another user help with email promotion without giving them access to our Bloomerang database. We archived a separate group of contacts on Mailchimp which then changed their email status in Bloomerang to 'opt out.' We had to have the Bloomerang Data Services team fix the addresses which delayed our next email communication by almost two weeks.