Ahh... Now that I after a while look at your pictures I think I get what you after.. sometimes you just stares blind on something 😃

Something like this and it only does 2 server calls.

var count = 1; //Get the counter read

var gr = new GlideRecord('change_task'); //Fetch the records we want to update

gr.orderBy('NAME OF YOUR TASK FIELD');

gr.orderBy('sys_updated_on');

gr.query();

var gr2 = new GlideRecord('change_task'); //Fetch another set of record so we can compare to the "next" record

gr2.orderBy('NAME OF YOUR TASK FIELD');

gr2.orderBy('sys_updated_on');

gr2.query();

gr2.next();//Skip ahead one record so gr2 always is one record ahead of gr

while(gr.next()){

if(!gr2.next()){//If there isn't a next record in gr2, gr is the last one

gr.setValue('u_last',true);//To handle the last record

}

gr.setValue('u_order',count);

//Check if the is is the last one and reset the counter if that is true.

if (gr.getValue('NAME OF YOUR TASK FIELD') != gr2.getValue('NAME OF YOUR TASK FIELD')){

gr.setValue('u_last',true);

count = 1;

}

//If it isn't the last one, add 1 to the counter

else {

count++;

}

gr.autoSysFields(false); //Guess you don't want the sys_updated_on field to be updated when you run your script.

gr.update();

}

//Göran