Would definately help to see a sample of your workbook, even with some dummy data put in.
Perhaps this will help for the time-being -
1. If you are using filters, try playing around with the context settings. I had a similar issue with a single filter on my paretos. Right-click the filter then 'Add to context'. Fixed it for me anyway.
2. See screenshot of my table calc:
3. The length is probably just too long for the column. Try to format the alignment to read vertically, if that's possible on a reference label.
The issue with the pareto not working 100% seems to be because of the way I have to filter the stacked bar. I am using index =1-5, so this is also being applied to the Pareto line. If I don’t include sub-category on the detail I can get the pareto, but it stops after the 5th state. If I do have sub-category on there I cannot get one single line.