U.S. Bancorp Credit Card Complaint

U.S. Bancorp Credit card department,

Payoff process New Jersey

Over the past 18 months or so, I made - balance transfers onto - credit card. The interest rate on each transfer was 0 % until - different expiry dates : -/-/- -, - -, and -/-/-. - This is the order in which they appear on the interest charge calculation page of my bill. ) I paid the minimum amount due every month until -. Every month, that amount was subtracted from the balance with the 0 % expiry date -/-/-. In -, I paid an amount equal to the balance left on the balance transfer with the 0 % expiry date -/-/-. Rather than subtracting that amount from the balance with the -/-/- expiry date, the credit card company paid off the balance due -/-/-, and paid down some of the balance due -/-/-. I am now paying interest on the balance due -/-/-. This seems very shady and bogus. Is that even legal anymore?