Are you sure you have an orange Lead Is Created trigger in your smart list, and not a green Lead Is Created filter?
Another way to tell is in the Schedule tab for your campaign. A trigger in the smart list will give you the Activate button the Schedule, while having a filter in the Smart List will make it so you have to schedule the smart campaign to run at some future time.
Hi John - it is definitely a trigger campaign.
The only thing I can think of is that it started life as a batch campaign?
I'll keep monitoring it.
What is the Trigger exactly? Are you using constraints?
Is this set to run once per lead?