If you look at the grade/report/singleview/index/php you will see that pagelayout is defined twice, first as 'redirect; and secondly as 'report'. It could well be that this is perhaps where it is wrong, and that the pagelayout needs to be defined as 'base' (which has no block regions) and NOT 'report' (which has block regions).
But this all depends on what is expected to be seen on that 'Single View' page when it is displayed?