Your figures are wrong, but I'm guessing that's because it hasn't taken into account the first price change. My smallest gate receipt has been $56,523 and my largest was last games $65,644; so my average can't be only $55k. Probably a shade over 60k, looking at my own internal figures.
Pretty happy with how the seasons progressing, now I just hope there's an 18yo ATG for me to draft ;)