The Garlean Empire is from the land of Garlemald (Located North East of Eorzea). There lies an Iron Works that creates machines, airships, and other "spoiler filled" goodies used by the Empire, which is referred to as the Garlond Ironworks.
I do not believe there are any errors in the writing, I believe the writers intended for it to be written that way.
The Garlond Ironworks can be named after a man who runs it ~~ OR ~~ Garlond is another way of showing possession of someone or something from that land (or city). They even start with the same 4 letters (Garl).
EX: Garlean Airship, Garlond Airship, Garlemald's Airship
They are different ways of showing they belong to a person or place residing in that area. Garlond Goggle's (a special item) is from the Garlond Ironworks. It proves they meant to write it that way. It was repeated more than once.
