2: We thought that, but the letter-indicator only has 5 letters, not the 7 letters that picture refers to.
3: Two different letters.
I think for 2 you may be looking at the wrong picture, it's the picture on A5 which has five letters? However with regards to 3 it looks like I've got a correction to make. Sorry for the confusion and thanks for the feedback.
Ah, yes, we thought it was referring to the picture on A15, that's totally on us! :)
