Binding source filtering data

Hi, one table with two columns is data source of binding source. We want to filter data first my “Name”, and after that by “City”.

bindingSource.Filter="Name = 'John'";

Result:

If another filter is applied (WITHOUT bindingSource.RemoveFilter())

bindingSource.Filter="City = 'London'";

Result:

My question is: If once binding source is filtered and filter is not removed, why second filter is not applied only on already filtered data?

if first filter filtered data once and is applied second filter on filtered data why we have not situation like

bindingSource.Filter="Name ='John' AND City = 'London'";