Years ago I had blind girlfriend, so I learned a bit of braille. Not only is it strange that they have braille on things like bank drive through ATM's, but how they spell things is also sometimes strange. The braille system does not have separate upper and lower case letters, but it has a symbol for upper case, which proceeds an upper case letter. If there are two of these symbols in a row, it means that the following text is all caps.
On things like ATM's, the normal text is always all caps, and so any braille of the text always has the "all caps" symbols before the actual text. I always wondered why they bother to do that. It doesn't change the meaning at all, but just takes up space.