Reports :: Show Topics With Multiple Subtopics In A Report

I have a table with some meeting topics, and I have another table with subtopics for each topic of which there can be multiple instances on no instances at all (let's say weekly updates if that makes sense).

What I would like to have on a report is all the information, all the topics, and for each topic, all the subtopics, if there are any. As an example:

Code:
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Topic1 Description1 DueDate1 Responsible1 UpdateDate1.1 Comment1.1
UpdateDate1.2 Comment1.2
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Topic2 Description2 DueDate2 Responsible2
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Topic3 Description3 DueDate3 Responsible3 UpdateDate3.1 Comment3.1
UpdateDate3.2 Comment3.2
UpdateDate3.3 Comment3.3
-------------------------------------------------------------------------

What I tried so far is to make a query left joining the update table with the topics table and that seems to get all the data in one place, the only thing is that if more than one update is present for a topic, the topic will appear multiple times.

I then thought I could group the data into the report and I could ... sort of ... What I did is to add all the topic fields into the grouping header, that seemed to eliminate duplicates, but I don't like the results at all. First of all, the first (or only) update item does not appear on the same line as the topic, it appears below, and that would not even be that bad, I could live with that. The worst thing is that if a topic does not have any updates, empty fields are still present and they get shown even after grouping, as if being an actual entry. Even if updates are present, a blank line still appears along with the rest of the updates, even though it wasn't there before grouping.