Your credit card processing statements are confusing for a reason.
Credit card processors know that if they make their statements confusing and hard to read, you won't be able to figure out where they are hiding their junk fees and secret mark-ups. They also know from their insider research that the more confused you are about pricing, the less likely you will be to look elsewhere for a better solution.
Chances are, there are even fees on your statement that are completely made-up, and your processor is laughing all the way to the bank.