This issue is not caused by a bug in Print Edit WE and does not happen if you use Print Edit WE in Chrome. Unfortunately, there are known bugs in Firefox's print preview and print functionality that result in only the first (or first few) pages being previewed and printed. These bugs have existed for many years. However, there is a workaround in Print Edit WE - click on the 'Tools' button and select 'Fix Page Breaks'. This will fix the issue for most (but not all) pages.