If the course generation parameters are entered only partly, and the course generation menu is left for the main menu and then re-entered, the partial parameters are re-entered (usability skin)
How to reproduce:
Enter CG menu, select any area of interest, select any goals, select any scenario. Leave the CG menu, re-enter it. Then, you have to select the area of interest again, but the remaining parameters are filled automatically and the menu jumps to the last step. This is confusing (part of the paramters are kept, part have to be re-entered).
Better reset all parameters.