Bank Reconciliation

Hi. I am a new user of Navision. I am doing Bank Reconciliation. but it seems to be not very friendly. I did not get what has happened. I suggested the lines, it should bring all the cheques and transfers which have been done for this period; however it did not bring all the cheques to my Bank Rec. batch. At the same, time when I go to the Bank Account balance I can see them in General ledger and they are already cleared. How it could happened. I neither worked with this period before nor cleared these payments. Do you have any solution??? Thank you.