Checklists and the like don't necessarily prevent issues though. People performing the same operation time after time will get lulled into not paying full attention. That's the problem with repetitive operations that don't have a way to be QC'd other than a human verification.
I don't know what the laser marking machine is like that does the logos on the SLT, but I'd like to see it. We use laser etching on anodize every day, but our logos and text are never larger than about 1/2" high and the parts they go on less than 6 inches in any dimension. I do know with the way we do it, the logos are on a computer, so the only way we could get a misspelling such as this would be if the program was wrong to begin with. Our more common marking error is when a part gets held slightly off and a logo might be so close to an edge that it gets cut off.
I'm also impressed with the quality of the anodize on the SLT. My bike looks pretty close to flawless. At work we see anodize issues all the time (varying colors, voids, rack marks, blotches, etc).