Back in 2012 I posted
'I have noticed discrepancies in QV11 reports. What I see in edit mode is different when viewing in Print Preview. What is more, it is different again as a hard copy. This is making it very difficult to produce reports when each of the three "views" of the report are different. A particular issue is where labels on charts shift position from "edit report" to "Print Preview" '
As far as I am aware, this is still a potential issue with inbuilt reports. Physical prints are not an area Qlik has traditionally focused on or invested in. In the end, we started using NPrinting.