You printed a cheque but the balance of your bank account didn't change
If you made a payment but your account balance is unchanged, you may have entered the bank account as an allocation account by mistake. The effect of such a transaction would take money from the account, then put it right back, causing no change to the account's balance. It's also possible that you selected a bank or credit card account other than the one you intended.
Locate the payment in the Bank Register window. If you've used the bank account as the allocation account, the transaction will appear in the transaction history twice -- once as a withdrawal, and a second time as a deposit. Click the zoom arrow that appears to the left of the transaction (if it appears twice, you can click either arrow); the transaction will appear in the Spend Money window as you originally entered it. Depending upon how your preferences have been set, you can either edit the incorrect account or reverse the transaction and reenter it with the correct account. (Choosing changeable or unchangeable transactions)