It can sometimes happen that worker's config on the machine is different than what is saved on minerstat dashboard. This can happen when you are changing pools and wallets from the machine's dashboard instead of minerstat config page after the original config was already saved to minerstat dashboard.
You can quickly fix this by resyncing the configuration from worker's profile.
This action will remove worker's config from minerstat dashboard and re-sync it with machine's config on the next sync. You should see correct config within few minutes.