When you started you should have a balance sheet for your opening entry and you are entering a journal entry for opening balances.

When you posted that entry in increased checking for those checks.  That will throw the entry out of balance and you have to post that somewhere.  I would post it to ask my accountant or retained earnings.

Then you go to the check register and post the checks with a date on or before the beginning balance.  The account you post those accounts to is ask my accountant or retained earnings.  This will clear the adjustment on the opening entry and put your balance sheet back in balance.

Run your reports and see if you see what else is out of balance.

Also, check your date on those checks and the opening balance entry to make sure they are dated correctly.