Have you verified that the “latitude” and “longitude” values of the green event block exactly match values in your Airtable column? Have you assigned labels to each of the four values (two lat/lon pairs) you’re testing to make sure you’re seeing what you expect them to be?
Your blocks look really convoluted to me. Why not just use “find first occurrence of” block in the List drawer to see if the “list of values” from Airtable contains the lat/lon value you are getting from the event block? If the result of the “find first occurrence” block is 0, it isn’t found. If it’s a number greater than 0 then it refers to the row it was found in.
If “longitude found in row #” equals “latitude found in row #” then you know the same row had matching longitude and latitude values.