Why is the payout amount $50 less than what was stated?

Just sold my Sabrina Carpenter tickets. I had both listed to give me a total payout of $500.XX… This is what was reflected on their “this is how much you’ll make” page when adjusting the listing.

I know for certain because I myself over payed for the tickets, and $500 was the lowest I was willing to go.

Now that they’ve sold it says I’m waiting for a payout of $449.53. Wtf?!