We had kicked off some campaigns and Governance only seems to kick off the first email and does not send the others,
For example with this configuration only the day 15 or less escalation email is being sent:
Why are we only getting the first email?
Release : 14.4
The order of the email is what was preventing you from getting all of the escalation emails you are expecting and reversing the order, so the 0 day is first, day 1 second and so on should result in you getting each of those emails at their appropriate time.
To prevent users from getting multiple emails, check the 'Use email aggregation' box, this will roll up all valid emails for a single recipient into one email.