There can be confusion between direct opens stat and influenced stat. Let me clarify both data.
Direct opens: The total number of users who opened your app by swipping (iOS) / tapping (Android) on the notification or clicking on desktop for web push notifications.
Influenced opens: Total number of users who received a notification and opened your app within 3 hours.
You will find more information on the stats displayed on the dashboard in the documentation:
Basic analytics: https://batch.com/doc/dashboard/analytics/overview.html
Push analytics: https://batch.com/doc/dashboard/push/analytics.html