Grouping/Sorting in Excel - Sub-groups not sorting with grouped row

[OliverBP]

I'm having some issues with grouping and sorting those groups in Excel. Hoping someone can help.

Picture of the excel I'm using here: http://i.imgur.com/XX0uput.png

Each green coloured row is supposed to be a subcategory of the white coloured row above it. When I group rows 8-10 with Row 7 and then sort by the Fund Manager column, rows 8-10 remain where they are and row 7 sorts alphabetically. This applies for all the groupings I've used in the sheet.

Further step-by-step examples of what I mean:

Grouping: http://i.imgur.com/ImZUdkC.png

Sorted alphabetically, the grouped data remains in rows 8-10, rather than following the data that was originally in Row 7: http://i.imgur.com/vUU5x4l.png

Help would be appreciated, this is driving me insane as it used to work

 

[OliverBP]

Yep, of course.

https://www.dropbox.com/s/8w7u345c54tpjnu/Holdings Comparison.xlsx?dl=0

Thanks for taking the time to have a look