Why can I see two transactions on my bank statement?
This will be a double or pending charge on your bank account or credit card. It is common practice for banks and credit card companies to authorise electronic transactions made with a debit or credit card, and hold the balance as unavailable either until the merchant clears the transaction or the hold falls off.
For debit cards, authorisation holds can fall off the account from one to five days after the transaction date, depending on the bank's policy. For credit cards, holds can last as long as 30 days, depending on the issuing bank.