I am using the ExportToPDF2 method to export my DraftSight sheets to PDF using the COM Assembly with C# in Visual Basic. When exporting my sheets to PDF, some of the 3d PolyLines that have many vertexes are being exported with many of the points missing, leading to malformed polygons. This does not happen with printing the document to PDF via the print manager in the app, but my use case requires exporting the sheets to PDF automatically. 

I've tried raising the BitmapResolution but that didn't affect anything. There is also no difference when not using a PrintStyleTable. Here is the code I am using to create the PDF output.

// Get all sheets from the document
string[] exportSheets = ((IEnumerable)dsDoc.GetSheets())
    .Cast()
    .Where(sheet => !sheet.Name.Equals("model", StringComparison.OrdinalIgnoreCase))
    .Select(sheet => sheet.Name)
    .ToArray();

// Create export settings and configure
DocumentExporter docExporter = dsDoc.GetDocumentExporter();
ExportSettings exportSettings = docExporter.CreateExportSettings();
exportSettings.Sheets = exportSheets;
exportSettings.PaperSize = "ANSI B (17.00 x 11.00 Inches)";
exportSettings.SetPrintMargins(0, 0, 0, 0);
exportSettings.PrintStyleTable = "monochrome.ctb";
exportSettings.EnableCustomBitmapResolution = true;
exportSettings.CustomBitmapResolution = 600;
exportSettings.EnableLayersInPDFFile = false;

// Export Sheets to PDF
bool result = docExporter.ExportToPdf2(pdfOutputPath, exportSettings);

Any ideas on what could be going on?