With the latest wp table-reload-plugin plus your fixed header utils, the top floating clone table header is not in accurate height with the original table header and it looks a bit messy.
Check out this image
I have temporarily fixed this issue by giving an equal height to the original table header in the class FixedHeader_Cloned table. But various table header might have different height and it should be automatically fixed the height for the clone header generated by fixedheader. Any input will be helpful...
Btw, it will be great to integrate FixedHeader utils with the plugin as an extended option in the upcoming version as well as it might worth upgrading to datatable.js to 1.9