Purchase order printout and PDF inconsistencies and problems

On an ERPnext v9.2.7 / Frappe v9.2.9 I have made a list of items to purchase. I have no customizations on the relative DocTypes.

The list shows the sums correctly, as shown in the screenshot.
list_small
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The print preview shows up like this:
print_preview_small
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Notice the existence of grid lines on the table, the right justified sums, the item pictures.

By clicking on the “PDF” button to export to PDF directly, there are inconsistencies:


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Specifically, no item pictures are shown and no grid lines, the total sums are LEFT justified and there is a blank page at the end. Notice the pagination is correct.

If I try to print the order directly, many issues are correct but pagination is not correct:


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So what do I do to export PDFs correctly from within ERPnext, to send by email?
Is this issue a bug? An error? Can I do something to rectify it?