Difference between Detailed Tables and Subject Tables

Hi,

I'm new to using the census tables and had a question on the difference between the estimates given in the ACS subject tables and detailed tables.

For instance - I was looking at the Number of individuals that are below certain percentages of the poverty level for a given county

The 2019 ACS 1Yr detailed table estimates provide a total of 452k people where 5.9k are below the 50% poverty level:

https://data.census.gov/cedsci/table?q=ALL%20INDIVIDUALS%20WITH%20INCOME%20BELOW%20THE%20FOLLOWING%20POVERTY%20RATIOS&t=Income%20and%20Poverty%3APoverty&g=0500000US06085&y=2019&d=ACS%201-Year%20Estimates%20Detailed%20Tables&tid=ACSDT1Y2019.B17026&hidePreview=true

The 2019 ACS 1Yr detailed table estimates provide a total of 1.8M people where 52.9k are below the 50% poverty level:

https://data.census.gov/cedsci/table?q=s1701&g=0500000US06085&y=2019&d=ACS%201-Year%20Estimates%20Subject%20Tables&tid=ACSST1Y2019.S1701&hidePreview=true

I have a feeling there's a hole in my understanding of what these tables provide or some unforeseen discrepency in the filters i'm using - but i'd like to understand why i'm seeing this discrepency -- and if what the difference is between the subject and detailed table, which one would you recommend for use?

Thanks.