'fraid not Toby, this is a mystery. I looked up the transactions and it looks like you were given the correct 10 point win, but you were also supplemented 19

.
When the game ended you had 71

in your account, 100 - (71+10) = 19

short, which seems like the only explanation for why it's 19. The problem is that you had 54

in other games, and I have no idea why it seems to have just ignored it
Also your current total points is a small number of points higher than you were at when you won that game, and the points transaction logs can't account for it
Thanks for letting me know about this. I'll leave those points for now though, it'll get corrected when everything is working and it's safe to make corrections from the logged pointsWon values (which seem to always get calculated and stored correctly, which makes things even more confusing)