Hi Randi,
Like elsewhere in studio, you generally need to publish the changes for this to feed through to ALL users.
If the user has configured the cost plan in any way, then your changes wouldn't show. You'd need them to reset to default or force a publish.
I've seen a few occasions in multi server clusters where config hasn't applied, a restart of the services normally fixes that.
If you want to know who is impacted, get in touch and i'll share the query
Andrew