Why did a notification match my alarm?

An alarm matches when the app is the same, the sender matches (if you set one) and the notification contains one of your words (if you set any).

If you aren't sure

1. Open the History tab and find the notification.
2. Compare it with the Application, From and Contains values of your alarms.
3. Open the alarm and adjust the fields.

Duplicates

If you try to create an alarm that already exists, the app tells you which alarm matches it, with its details, so you can edit that one instead.