I think I have a misunderstanding about how Renko chart is constructed.

My question is

Looking at renko_bricks and renko_dates obtained by using return_calculated_values, Isn't it supposed to have a one-to-one relationship between renko_bricks and renko_dates? On a specific day, we might have one brick or not based on brick calculation which is I know. But there are duplicate renko_dates.

Can someone explain that?