This change was required for the SharePoint 2013 Upgrade (from SharePoint 2010), otherwise the page would only post back once and needed to be closed and re-opened to resubmit updates. The change was in private Control RenderHeaderBar()

var header2 = new HtmlGenericControl("h4");

string text2 = "Report ID:" + InspectionReportId + " GUID:" + InspectionReportGuid;

header2.InnerText = text2;

headerBox.Controls.Add(header2);