My account is less than a week old, yet the transaction history in MY ACCOUNT goes back a year and shows PAGES of transactions I never made......I have had 2 fricken trades on this exchange yet it shows HUNDREDS. Interesting how my account can have trading history dating back a year before the damn account was even open........and with many coins I have never heard of, let alone ever had?!
What kind of order were you using? This sounds lot like a bunch of partial fills.