Sorry for using an old thread, but I am experiencing the same problem while evaluating the latest version of Aspose.Words (11.1.0). I have some templates that are rendered 100% when saving as doc and docx format. Note the documents are created with a mail merge.
When saving as PDF (or XPS) the column widths of tablles in the word document are lost. The width of the first column in the table is expanded to the width of the merge fields present in the word document (at least this seems to be the case).
I’ve tried re-loading the output doc/docx file, then saving this as PDF and XPS and the same problem exists. When opening the document in word, then using word to save as PDF or XPS the column widths are correct.
There must be some way to force the column width on export to PDF as this is a required feature.