Some debit-card users at Winn-Dixie supermarkets were double charged earlier this week, but the company said it's working to make refunds for those who were charged extra.
One or more of the companies that process the chain's debit payments had intermittent communication problems Tuesday.
Winn-Dixie says delays in the network causes the stores' computers to become confused and resubmit some of that day's payment requests. Because the outage occurred on and off throughout the day, not all Winn-Dixie customers were charged twice.
Some of the chain's Thriftway and SaveRite grocery stores also had the trouble. The chain has more than 1,000 stores, including Thriftway and SaveRite.
The situation comes on the heels of similar problems at Publix supermarkets and Wal-Mart stores.