Deductions & credits

Actually you should have got 1800 on your 2020 return 1200+600.  Wonder why you didn't get the second amount?  

 

For the 3rd 1400 check......

That's ok if you both got it.  You got it based on your 2020 return and she must have got it based on 2019 when she claimed you.  You can both keep it.