Doubt with Left Join

[miguel_krt]

Hello everyone!
I have a database with the registry of payments.
Some rows have the same data, amount, property and "property_id" (this last one used to merge with another database)
What I'm seeing is that when merging the datasources, the "repeated" row is not being counted, even though the theory of Left Join would be "all rows from the left data source"

Am I getting this correctly?
Does Looker have some filter to "delete" repeated rows? 

Thanks in advance!