DNN Search Index

Hi, I know it is possible to have the data indexed bij DNN Search. Simply by adding this to a template main section in manifest.json:

"dnnsearch": true,
"dnnSearchTitle": "{{Title}}",
"dnnSearchDescription": "{{convertHtmlToText Description}}",
"dnnSearchText": "{{Title}} {{convertHtmlToText Description}}",

However, I've come to the conclusion that not everything that is showed/added in that template is indexed. For example the intro title and description and some custom additionalData fields. Also, I really would like to be able to choose which module is indexed and which is not. In my recent case I have 2 modules, each filled with hundreds of questions and answers.
These faq's I use through-out the website on multiple pages. So, I use a single source to display the content on multiple pages, often filtered by a certain field.

This way was mandatory in order to create an orderly and easy way of administer the FAQ's.

When I deselect the module Advanced Settings 'Allow Indexing' of the 2 source modules and select this setting in all other modules, I would expect the 2 source modules not indexed and all other modules indexed. Sadly this is not the case.

Any advise, tips or examples are welcome!