When you look up a classification (for example in the Meteoritical Bulletin Database) you will see a variety of information in addition to the classifications discussed above. This additional information will likely include a date and location (latitude and longitude), in addition to some or all of the following:
Naming meteorites - Usually a meteorite's name will derive from a location close to where it fell or was found. The only exceptions are locations, such as the Earth's hot and cold deserts, where many finds, from a variety of falls, have been made. These multiple finds are each given the same location name along with a number to distinguish them. For example in Antarctica, the Thiel Mountains series of finds. Since the mid 1990's a great deal of meteorites have been found in the hot deserts of the world. This has produced a number of series including Sahara, Dhofar and North West Africa. North West Africa (NWA) is the most prolific of these and predominantly includes stones found in the deserts of Morocco and Algeria. Often these have been found by nomads and accurate individual find coordinates have not been recorded. Meteorites have been discovered in NWA at a rate far faster than laboratories can classify them, you will therefore see meteorites described as unclassified NWA. Most unclassified NWA meteorites are likely to be ordinary chondrites (LL, L or H type) since these are more commonly found and anything unusual will have been spotted by meteorite dealers in Morocco or elsewhere.
Pairing - In NWA (and elsewhere) it is possible for stones which originated in the same fall to become separated from each other unintentionally (or in some cases intentionally). The deserts have preserved many thousands of falls over several thousand years, their strewnfields are likely to overlap and the recovery/sales process may result in an amount of 'mixing'. This can result in a single meteorite fall being classified multiple times and represented by several NWA numbers. These individual classifications are described as paired. Meteorite dealers sometimes sell stones as 'likely paired', which means that they are visually indistinguishable from another classified stone, but this has not been confirmed by a laboratory analysis.