Change SFDC Campaign Status, Add to SFDC Campaign, and Sync Lead to SFDC Campaign flow steps are skipped/failed when the SFDC Campaign is synced with a Marketo Program.
When the Marketo Program is synced with the SFDC Campaign, Marketo Program Membership will automatically sync over status updates to Salesforce.
This automatic process overrides the all SFDC Campaign-related and Sync-related flow steps and will cause them to be skipped/fail in Smart Campaigns.