A problem with missing miles started last Monday for me too.
I check each day and I'm only getting 10% to 60% of the miles I'm driving. We're always told the miles will catch up with us but typically they don't.
Because I expense most of my miles I track them on a spreadsheet. I started another column for WAZE credits and list them daily. I'm not guessing, I know to the mile what I drive each day.
Re: Points not being added up...?