Advanced row grouping filters aren't working

dajobeuz

Hello I have the following problem, i try the advanced row group tutorial but it doesn't work for me so i implement my own row grouping way, i also implement totalization on each group, here you can see http://prntscr.com/7cmo9g but when i implement a filter http://prntscr.com/7cmowi and when i delete it remains the same http://prntscr.com/7cmnxe
Here it's the code https://gist.github.com/djbu/edcb0f6f7ac5dc6fb14c (i'm using cakephp) i try adding the draw just before the filter but it doesn't work. Any ideas? Thanks in advance