Importer Skipping All Lines

Hey guys,

I'm running an import, and when I get the preview I see exactly what I want but when I run the import it breaks. 

Here is the JSON of what I am posting:

{
    "app_id": 15168835,
    "mappings": [
        {
            "field_id": 117823157,
            "unique": false,
            "value": {
                "app_id": 10376412,
                "mappings": [
                    {
                        "field_id": 80268421,
                        "unique": true,
                        "value": {
                            "column_id": "1"
                        }
                    }
                ]
            }
        },
        {
            "field_id": 116759830,
            "unique": false,
            "value": {
                "app_id": 15168805,
                "mappings": [
                    {
                        "field_id": 116759657,
                        "unique": true,
                        "value": {
                            "column_id": "0"
                        }
                    }
                ]
            }
        },
        {
            "field_id": 116759828,
            "unique": false,
            "value": {
                "value_column_id": "3"
            }
        },
        {
            "field_id": 116759682,
            "unique": true,
            "value": {
                "column_id": "4"
            }
        },
        {
            "field_id": 116759829,
            "unique": true,
            "value": {
              "start_column_id": "2",
              "day_first": false
            }
        }
    ],
    "tags_column_id":"5"
}

The only piece I can think might be wrong with this is the fact that the second column (1 in the json) is blank for about half of the lines, but even the lines where it isn't blank aren't coming through. When I run this through the front end importer with the same mappings it comes through perfectly. I haven't checked with inspect element that I have the exact same mappings, but it does create a batch.