This approach is *extremely* cumbersome for a number of reasons (Excel to Word, a merge, to PDF, to Inkscape, then Hershey Text). The bugs are something that we could look at, depending on what their exact nature is.
Word doesn’t support stroke fonts, nor is there any good workflow for plotting directly from Word.
The software that you should use for this is our AxiDraw Merge application (as discussed in the AxiDraw user guide). Once you are set up with it, AxiDraw Merge can automatically (1) optionally populate a template with data sourced from a CSV spreadsheet file, (2) render the text into handwriting-like stroke-based fonts using our Hershey Advanced software, (3) optionally add intentional variations so that text does not (for example) lie upon straight lines, and (4) plot the document. It can also merge and plot subsequent pages upon a button press or after a time delay.