Is it legal for an employer to pay you a lesser amount per hour on your final paycheck?

When I quit my position as line cook at a restaurant, the owner retaliated by placing a stop payment on my next-to-last paycheck. This action emptied my bank account and incurred $145 in overdraft fees. I went to my bank, they refunded all but $35 (because it hadn't shown up yet, it was a Friday). I put the employer on the phone with the bank clerk. He said he would reissue the check. Today, I received both the reissued check and my final paycheck. My final hours were paid at a rate $5 per hour less than what I normally would be paid. The employer said because he is mad I quit. Is this legal? And can I recover the overdraft fees (the bank didn't refund) from my former employer?