While using "search" I can't find all my photos, why?
Search does work only within current competition, so if you took part in other competitions (or their previous editions) you can't find them using "search". Good news is that you can see all your entries on your profile page.
How can I delete my account?
Sign in, enter your profile page by clicking your nickname on the top. Find tool menu on profile page and click on "Remove profile". For security reasons you will be asked to write your password again. When removing your profile all your data and entries will be deleted within 24 hours.
Can I change my nick name?
The nick name can't be changed.