Reposting level

It's not possible to change or replace a level once it has been uploaded to the Levels section. You can upload the new version, then delete your old version (but then you will lose all the ratings and comments on that version). Or you can put the new version in a comment under the old version (but then it is less likely to be seen). Sorry there's not a better way to do it. Most people just upload the new version and delete the old one. If you do this, it helps to make a comment to explain why you posted the new version, so players aren't confused.