Outstanding authorization still reflects plus actual charge (duplicate charges)

<p>Please resolve. A transaction that should have reversed in 3 working days is still reflecting on my account. The "holding transaction" was higher than the actual amount of the transaction upon completion of order. But both the holding transaction (order request) and the invoiced transaction (actual after deducting out of stock items) both appear on my statement (and it's been reflected this way since 18 Jan where both deductions appear making my balance appear lower than it should). The retailer claims that my bank should have released the holding transaction amount back to my account within 3 working days. Only the final transaction should appear. Please fix this... The retailer says that they require my card number per my bank's instructions which makes me nervous. They should not know my card number and my bank shouldn't be asking a retailer to ask me for their customer's bank card number... they usually only see the last 4 digits on the transaction. I'm sure that this is for security purposes so I expect my bank to be more serious about my card security...I can forward the email from the retailer for more information. Please resolve this...</p>