Very strange price history

[akreider]

I was selling No Contest and the price seemed to go up and down while I was selling it (and while there weren't any other trades at least according to the UI). It should have gone straight down.

Tentatively, it looks like I'm actually getting the amounts specified too. For instance here I get paid 0.35 USDC for 0.40 No Contests.
https://polygonscan.com/tx/0x32b1a0cd38c4cc330520ecf647b9be04bf6ae727e0978a1afd486882ef80ab1d