Accidentally entered courses in opposite semesters?

I submitted my application to the University of Minnesota today, but realized that I entered my two one-semester courses in switched semesters (something I’m taking semester 2 is entered as semester 1, vice versa). Should I report this to them now or is it okay to leave?

It was a simple mistake. There’d be no harm in shooting them an email with the corrected summation of your courses – this is extremely minor but worth the courteous note to them. Certainly, they’d look at your official transcript anyway.