How do I remove grouping of grouped columns?

Summary:

I have created a report with a subject area and it has worked fine... For some reason, it's suddenly decided to group almost all my chosen columns and I simply can't figure out where to break up that grouping?

Content (required):

For some reasons my analysis groups the columns and leaves me with no options to edit the columns, as you can see below.

I have tried hard to search for where to break up theese groupings, but I can't seem to find anything on what to do - there is nothing in selection Steps etc.

Really hope that someone has seen this before and knows what to do