Webview pdf poor quality and fit

Hi, I started a thread a while ago about exporting tables to pdf and eventually was helped to a solution (see attached file). Now I seem to have three different problems (but probably related) in that

1. the table shown in the Webview is a much higher quality than the resulting pdf
2. the last two columns in the table are not shown in the pdf. i.e. the table is wider than A4 width
3. the pdf table is at the bottom of the page rather than starting at the top

Can anyone advise how to resolve these problems? Thanks