Does it matter that I took the pill for different day?

I got on the combined pill (Sidreta) last Thursday. I didn't notice that I took the wrong "Wednesday pill" yesterday (from the first row instead of the second one) and today I took another Wednesday pill (this time from the second row), because I thought I forgot about it yesterday, but fortunately before I took also the next one I realized that I didn't forget yesterday, but used the wrong row.

Is it a problem that I took the pill for the day before? I never knew if the days are written just to keep track or if the pills are actually different for different days.

EDIT: the pills all look the same and there's nothing about it written on the insert, so I just wanted to make sure