My error is different than that though: Challenge Not yet complete... here's what's wrong: 
The process does not appear to be processing 'Closed Won' first and then 'Closed Won and Banking'.

Except for it does look to be in that correct order, and activated! I even went back and deleted the older Inactive versions to get the previous challange to pass. 

Here is a link to the challange: https://trailhead.salesforce.com/modules/workflow_migration/units/workflow_migration_order

Any suggesstions?