Alerting notification policy labels

Hello,
I have a question about notification policies
I have two alerts with those labels
Alert 1: Environment= Prod
Service = app
Subscription = xxx
Alert 2: Environment=Prod
Service = app
Subscription = xxx
Config = 1
and two notificaion policies with those matching labels
Policy 1. Environment= Prod
Service = app
Subscription = xxx
Policy 2. Environment=Prod
Service = app
Subscription = xxx
Config = 1
Can someone explain why Alert 1 and Alert2 are both routed to Policy 1?
I assumed that labels had AND matching
Thank you