Hi Ecenur,
I think you might have been working on the project as I was taking a look at it, because the debugger once threw an error about not finding a csv table, which was consistent with the copy of your project I created (which had only one csv file) but then I refreshed the page and no longer saw the error, and the copy I created after that showed three csv files
I am not sure I understood your description of the problem: what do/did the “really weird mixed-up sentences” consist of? Do you mean that some row.questions come/came from lines in the table that had different values in their group cell?
Jeremy