One Letter Difference

In the parking lot of my home building there is a reservation sign which I had for a long time red as LEVYPAJA (“sheet workshop”). One day I noticed I had red it wrong for all these years: the correct name was LEVYPALA (“piece of sheet”). There was a difference of one letter, but it caused very clear and straightforward idea in my mind (a workshop, where they maybe make things out of metal sheets) to change into more mysterious one (what could they do in a company called “piece of sheet”?)