How to get correct untrimmed surface from the simple polylines and lines? (15.3 KB)

Hello everyone. Need your help with the simple definition. I have 6 polylines which is internalised into curve parameter. I make 3 other from them to get 4 edged surface to panalize with lunchbox later. But the surfaces i get is not correct - where is my mistake? I tried to change the numbers of control points, flipped curves - nothing helped. I see i dont understand something related to isolines creating. I need to get simple “flat” untrimmed surfaces to get normal irregular brick pattern on them. Thank u in advance for help