Issue after update cell value

alim91

i use datatables jquery plugin (.datatable()) and i use fnUpdate() to update row values. in each row i have qty column wich is '1' by default. in the next cell on the row, i have two button (+ and -) to increment and decrement the value. everything is working well on first page(sheet), but in the next pages, when i press any of the buttons it call return me to the first page.
how can i fix it