Ui_list problem

Hi , i am working on UI list i have some problem regarding UI List

  1. my first problem was

seems the Node of UI_LIST need be triggered otherwise the flow cannot be established.

Is is possible for this flow to work WITHOUT ANY action in clicking the checkbox

OR

  1. I am getting data from my database/or MQTT ,
    and i want to choose by CHECKBOX to show only someresult.
    the work flow is somehow like this:

    but i encounter a problem that the payload is Override by the latter one..

Please i would apprecaite if someone can help~

Thanks