Pay no attention.
Because there is no way of indicating that you want to use your cards the way they should be used. Some but not all allowed to post a balance, and then all posted balances paid off by the due date, and doing that month after month without fail.
That simulator also gives me no score change for my accounts aging for 2 years, lol, when clearly that helps a young AAoA, and gets rid of brand new status completely, AND lets all inquiries leave off.
I fiddle with it for entertainment occasionally.
