Listbox issue + Setfocus after property Issue

Hi Kindly help me solving my issue.

Please refer attached macro, Its a small Project for a school.

My issues :

1. In the Userform1, If we enter a Previously assigned Admission No , it will show as its already assigned to some student which is correct Example Search for S01. but its set focus is lost, I want the set focus to be back on Admission_no

2. In the Userform3, this is for viewing student history. I am unable to get the filtered data on the list box. which currently managed by copying the filtered data from sheet Student_data to another sheet Payment_ History and then displaying that full data on the listbox LS1. which is not feasible actually because I have another more filters to add-on like.
Paid and outstanding to show on list box based on search type. (through command buttons Cleared and Outstanding on the userform) - Cleared should show filtered result taking the values of that rows where balance amount(column L) is Zero in the excel, and <>0 for Outstanding.

so I need filtered data to show on listbox based on filter.

Pls help me here.