The communications method for synchronization of service event related communications at an event management platform, may include receiving a notification transmitted from a service event source including event information related to at least one service offered by the service event source and for a mobile wireless device associated with a given service user, and including a synchronization value associated with a service instance. The method may further include storing the synchronization value, and receiving a subsequent notification transmitted from the service event source including a subsequent synchronization value associated with the service instance. The subsequent synchronization value is compared with the stored synchronization value and based thereon a request is generated and sent to the service event source for event information associated with notifications having synchronization values between the subsequent synchronization value with the stored synchronization value. The notifications are provided to the mobile wireless device associated with the given service user.