It is a well established rule in genealogical documentation, that an event is recorded with the appropriate geographic location existing at the time of the event. Here is an example from early Arizona history.
There is a small community in northern Arizona, presently called Joseph City. Originally, founded in 1876 with the name "Allen's Camp" the name of the town was changed to St. Josoph in January of 1878. Later, in 1923, the name of the town was changed to Joseph City to avoid confusion with St. Joseph, Missouri which was on the same mail and freight route across the country. Joseph City is presently in Navajo County. However, Navajo County was formed from Apache County on March 21, 1895. Apache County was created in 1879 from Yavapai County, one of the Arizona Territory's four original counties created in 1865.
This history is relatively uncomplicated compared to some geographic locations, but it illustrates the problem. A child born in that small Arizona town in 1878 would have been born in St. Joseph, Yavapai, Arizona Territory, United States. It would be very incorrect to record the birthplace as Joseph City, Navajo, Arizona, United States, which is what you get from the standardized place names. What is the answer? Don't use standardized place names unless they match the accurate designation of the location at the time of the event.
Here is a listing of a seach in the Standard Finder for "St. Joseph, Yavapai, Arizona":
|Joseph City|| Apache > Arizona > United States > World ||joseph city, st joseph,||Unknown||Joseph City, Apache, Arizona, United States||North America||US-AZ|| 34.93333 N|
|St. Joseph|| Apache > Arizona > United States > World ||st joseph,||Unknown||St. Joseph, Apache, Arizona, United States||North America||US-AZ|| || 8595331|
|Joseph City|| Navajo > Arizona > United States > World ||allen camp, allens camp, joseph city, saint joesph, st joseph,||Populated Place||Joseph City, Navajo, Arizona, United States||North America||US-AZ|| 34.95583 N|
|Saint Joseph|| Navajo > Arizona > United States > World ||s jsph, saint joseph, st joe, st joesph, st jos, st joseph, st josephs, st js, st jsph,||Unknown||Saint Joseph, Navajo, Arizona, United States||North America||US-AZ|| 34.93333 N|
As you can see, it is pretty much of a mess. Without some time line information, it would be impossible to make an accurate choice of which of the variations was the most acceptable.
Why is it important to record place names in effect at the time of the event? One very simple answer is that as jurisdictions change, so do record repositories. If you don't know the jurisdiction at the time of the event, then you may never find the records.
More later on this important subject.