One thing that gets me is the "Oh I can't spell, I must be Dyslexic" I am always tempted to reply, " I have Tourettes so please XXXX off".
The other thing that gets me is disbelief that I could be dyslexic, normally people just assumed that dyslexia is just about reading, when in reality it is so much more , both positive and negative.
I still find that people do not despite years of knowing recognise the struggles, trying to pick out which person we are talking about based solely upon their first name, leaving me scrabbling for which person we are talking about.