Unable to create more than 1 sns topic subscription event

[esteban-gs]

        {
            "function": "main.sns_handler_a",
            "name": "sns_handler_a",
            "event_source": {
                "arn": "arn:aws:sns:us-west-1:123:my-topic",
                "filters": {
                    "foo": [123],
                    "destination": ["trash"]
                },
                "events": [
                    "sns:Publish"
                ]
            }
        },
        {
            "function": "main.sns_handler_b",
            "name": "sns_handler_b",
            "event_source": {
                "arn": "arn:aws:sns:us-west-1:123:my-topic", // same topic
                "filters": { // different filters
                    "foo": [001],
                    "destination": ["not-trash"]
                },
                "events": [
                    "sns:Publish"
                ]
            }
        },

With the SNS events defined above, the zappa update and zappa deploy commands are unable to create 2 subscriptions with different filters to the same sns topic:

INFO:Created sns:Publish event schedule for main.sns_handler_a!
WARNING:sns:Publish event schedule for main.sns_handler_b already exists - Nothing to do here.

Is this behaving as expected? Or am I missing something. Based on how other events declarations behave in Zappa, I would assume that it would create 2 subscriptions to the same topic.