Sorting X group based on Month

harik

<p>Hi ,</p>
<p>      I tried to sort x-axis grouping  by month . when Y-optional category used to form stack  sort is not working Screen shot is mentioned in attached document. If we remove Y-optional category sorting is working fine. But we required Y-optional category as well. Please suggest any change required.</p>
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<p>Regards,</p>
<p>Hari</p>