Showing wrong daily spend amount!!!

For weeks, Facebook Ads sends me an alert with how much we spent that day -- except were on a daily spend of exactly $40 and every day the FB Ads app shows we spent a totally arbitrary amount of money between $63 and $80. Looking at the Ads Mgr online or even in the app shows that this number is totally incorrect. How can you not accurately tell me how much I spent? That seems like the most basic functionality...

Bluescentric about Meta Ads Manager