another problem about saving a case: Urgent
 

I am experiencing a very strange situation when I saved a case. When I saved a case with given file name (e.g., firtcase.q1) to a selected folder, the same Q1 file without file name (.q1)was generated and saved automatically in another folder at the same time. In addition, after running this case, the result file was generated and saved automatically directly to that folder I didn't select instead of one selected. This kind of problem didn't happen before, so, I really have no idea what is going on. I have to figure out this problem asap in order not to delay my work. Thank you.