Chevron

I had about 1/3 tank of gas but was driving to Sacramento so I filled it up the tank with mid grade gas approximately $3.73/ gallon at around noon on Dec 28 2018 at the Chevron Gas Station at 3239 Buskirk Ave, Pleasant Hill CA. When I checked my bank statement online on December 30 2018 I saw two transactions pending at the Chevron Station for the exact same amount $33.97. I called the bank and they told me to wait a couple of days to see if only one transaction posted. I drive a 2016 329i BMW with a 16 gallon gas tank. Today I checked and both transactions posted on Dec 31 2018 which is insane because even if the tank was completely empty I could not put that much gas in my car! At $3.73 X 16 gallons = $59.63. I was charged $67.94! Plus it would be nearly impossible to get exactly $33.97 twice on a pump! Something is really wrong here and I don't know what! The bank is sending me dispute paperwork.