Nycraz, Please do not type in capitals as this is considered yelling.
Now, The easiest way to do for you to take stock at 100% discount and keep records is:
1 - Make yourself as a cashier with your own password, and in cashier options tick all the "Allowed to... " that you feel you need. including "Allowed to sell employees at discount".
2 - Make a Customer account for yourself on Customer Options tick "Customer is an employee" and set discount on 100%.
3 - All the other cashiers make sure not to tick "Allowed to sell to employees" and any other actions that you don't want cashiers to do and not let them know your password.
Every time you need get something for yourself, log in with your cashier name and Password, select customer your account, receipt will be created with 100% discount and the quantity will be reduced.
I hope this can help.