When selecting a predefined site and enumerating the site manually you may see computers that do not fit the filter. For example, Microsoft Exchange site can give many computers that do not fit this filter.
Loose filter for manual objects.
During manual enumeration in the Intrust Manager the list is populated with all computers for which the filter could not be checked - computer is offline, not enough rights to access the computer, network failure, timeout received etc, the computer will be added to the list. Manual Enumeration is using loose filtering.
During gathering session when Enumeration object the filter is applied correctly - it will check each computer and then if the computer is unavailable for some reason (offline,network timeout, etc) the filter will reject this computer as not corresponding to the filter as with other computers that do not satisfy the filter.