I am with Fatelk on this one, it's a minor annoyance that one must grin and bear with.
Similar to those who call loaded ammo "bullets" and projectiles "heads", there are other examples but, thankfully, those who visit here and stay accept the corrections and adjust.
As far as the .45 Colt (.45 Long Colt) and .45 Schofield (.45 Short, not really but...... ), it is my understanding that in their original iterations there were differences in rim diameter and thickness, in addition to the length, that made cross use problematical.
A big supply problem for the army, at the time, that was solved by purging the system of any pistol that did not use the .45 Colt.
In this day and age, unless you own originals (and if you do you should probably already know what ammo it needs!), almost all replicas are chambered in the .45 Colt (at least in some iteration).