All alerts which are displayed in Map View will not be displayed in Experience View under problem/anomalies.
The transactions that happen during the alerted experiences (some alerts are yellow/red) that are counted as failed transactions. Creation of the problem/anomaly is a different story. Problem is created only when APM detects a root-cause otherwise it is just an anomaly. When an alert is created, that alert becomes part of the anomaly as evidence. The main logic point is that APM will not say about every alert, that it is a problem. This we should understand as it tries to be smarter, than converting every alert into a problem.