for Remove Older Record Button : Remove Older Record button will not directly make effect on the notification view. it deletes older records which are older then 10 days.
For notification update button : I can not get your point here. Because as per bottom update button it updates all parameters into database when we click on it.
Portout Repairs, Optimization : changes has been made for this task it will sort the data by clicking on the columns title.
I will update you for this letter. because i need to check the crone functionality for this.