You have provided an overall POT of 4.4% while the other statistics you have provided are in dollar profits and losses. POT profits and losses would be far more useful. Also knowing whether level staking or chasing losses is involved in the results provided influences how one looks at them.

My view is this is nothing but a statistical variation. There is no logical reason why Thursday or Friday results over the long term - hundreds of thousands of wagers - should be significantly different from Monday. The odds also favour a statistical variation being the reason for a loss in those $10.00 bets.