Solution Builder statistic not showing in dimension list

[#1]

I created a policy extract and collection statistic using the Solution Builder. After creating and deploying the updated policy, I submitted a few tests which contain data that should have been captured. I then created a new custom report. My new report statistic was not listed in either the metrics or dimensions drop down.

Extract XML:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ExtractVariables async="false" continueOnError="true" enabled="true" name="__extract-statistics-request__">
    <!-- Created by the Custom Analytics Collection tool on: Fri Sep 04 2015 15:34:04 GMT-0700 (PDT) -->
    <DisplayName>Extract Statistics Request</DisplayName>
    <JSONPayload>
        <Variable name="_jsonPayload" type="string">
            <JSONPath>$.importType</JSONPath>
        </Variable>
    </JSONPayload>
</ExtractVariables>

Collect XML:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<StatisticsCollector async="false" continueOnError="false" enabled="true" name="__collect-statistics-request__">
    <!-- Created by the Custom Analytics Collection tool on: Fri Sep 04 2015 15:34:04 GMT-0700 (PDT) -->
    <DisplayName>Collect Statistics Request</DisplayName>
    <Statistics>
        <Statistic name="import type" ref="_jsonPayload" type="String"/>
    </Statistics>
</StatisticsCollector>