Why do blocks always appear above the content of a module on its index page? Can I change this?

You will need to manipulate the theme.html file in order to place blocks where you want them relative to the module content.

One way round this is to try and put your module content in a block that will allow more flexible positioning

This Q&A was found on XOOPS Web Application System : https://xoops.org/modules/smartfaq/faq.php?faqid=371