Merge cells on a View

Hello All,
I had posted a question about merging cells in list view and this solution was provided:

https://asprunner.com/forums/topic/30494-Group-by-and-Merge-Grouped-cells

The grouping is done on the details table. This works perfectly when the master table is an actual table
But when the master table is a View the merging does not work which is strange because the detail table is exactly the same one that is linked to both the table table and the view table

The part of the code the puts the function into action is this:

The table_id in of the detail table in the table table and the view table master table are the same when I check in the elements in the browser, its 'form_grid_2'

Is there maybe a reason this doesnt work when the master table is a view or am I missing something here.

Thanks agian
Percy