This is pretty simple and there are only 2 explanations how he got that number of spirits.
1: The game registered one or any odd number of his spins as normal spirits not double
2: He started with an odd multiple of 13 to begin with like say 39 or 143 before he started his Tuesdays spins.
to kasims post number 21 in this thread(i will not quote because i dont want anyone that hasnt read it to read it by accident here as it is that stupid)
how is showing a division and an addition relevant to a statement about multiplication