I am part of the jDownloads Support team and write most of the documentation.
I have a very strange problem with Index. It always generates the Index itself. There is a Custom Module in sidebar-b that that usually displays the index OK but there are some occaisions when the index appears at the top of the article instead of in the module!

In this example I have located the problem to one sentence which if included gives the fault!
Various pics are included togetrer withe the code for the module and the article itself. I am using the JCE editor.

Colin