A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
One of the more common reasons to see these weird printing artifacts is the printer driver. What type of printer are you using, and what printer driver? If you connect to a different model printer and print with the most up-to-date drivers available for that other printer, what happens? You can also use virtual print drivers to test, for example try printing to a PDF file from a 3rd party PDF creation program like Adobe and look at the resulting PDF (you might also try the built-in PDF export function, but I wouldn't rely on that as an end-all, beat-all analysis).
It was a different version of Excel, but we had a similar problem and our workaround was to print to a PDF, then print the PDF to our normal printer and got the expected hardcopy. Not ideal, but our expensive, large corporate MDF didn't have any drivers that actually worked with the nuanced formatting in our documents. Maybe if you find better results with a different printer you can just go that way instead.