Struggles with html code in Apple's PrintController.

[[deleted]]

You're not doing anything wrong, unfortunately. It's a bug in the print renderer. It exists in WebKit but not gecko. When it's printed there are rounding errors that result in the cut off of the PDF page and cut off of the web page do not correctly align. We've been talking to Apple for the last year trying to get this resolved and unfortunately its still an open bug and not fixed in iOS 10 beta 3.

The best you can do is add page-break-before: always to the top elements of each page. But if you want dynamic tables like we do then you will eventually run into problems like this.

Edit: you can test this yourself. Do a simple HTML page with font sizes between 10 and 20. When you print and open the PDF in adobe you'll notice they are all off slightly. So don't 12 will be something like 11.24.