Since the new day is at 1300 every day . Schedule to the jobs run Sunday - Thu. SO that jobs will load on Sunday at 13:00 and Run on Mon @ 0700 .
You wanted run on 1st and last workday of the month, Use L1 and -L1 in in the Month days. Specify your calendar in-case if requires.

Close the work space and then delete the work space. it would automatically be unlocked with out any of your modifications.