Expand colum with lists

Hello,

I'm using PowerBI Desktop to display info from a Json file. Table created with imported data contains columns that are lists of objects. When I expand this tables with the Query Editor, this lists generate new duplicate rows where the only value wich is differen is rigth from this column. I have some dubtes about this:

- Is the info distorded because of expand lists?

- If, for example, I create a new colum in this dataset and then i whant to representate or compute a mesure, this info is distorded too?

- If affirmative, how can I do to correct this problem?

Thanks, regards