do not worry about prior years - it does not matter and doesn't work that way; it is a complicated subject and TT doesn't do any favors by saying you get $5800, which is what you are ELIGIBLE for before the income haircut.
I suspect your 2020 income is $214,000 so your stimulus is limited . (it's just math and I was able to back into it)
That is why it says you are due $200 based on 2020 numbers, but you are correct, since you received $264 originally, you can't be asked to return anything. Line 30 is zero.
if you really want to understand the gory details, fill out this worksheet; page 58
https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
