Filters 'Delay in Days' and 'Net Delay in Days' are defined by default with "Less Equal <=" 

e.g. if Net Delay in Days value is '1' - search will return also FOLs that have Net Delay in Days less than 1

Also negative values can be added to the filter.

In combination with filter Failure status = Only Late delivery the wished query can be generated.

Another option is to go on Apply Operators and select Equal

Is recommended to use the filter Net Delay in Days.

Contact SCOT Support