Windows Ads + sync rewards

I have 2 issues:

  1. Even though I activated Brave notifications on windows and made sure that rewards were activated on Brave browser, I’m not seeing any ads.
  2. I synced my computer and my phone. On my phone I have a few BAT thanks to ads (I can see them on phone, can’t see them on my computer), by my BAT balance is different from the one on my computer, even though they’re synced. How come?
    Thank you