It drives me insane as I always subconsciously interpret it as a form of lazyness, your framing of it as a form od dyslexia may finally allow me to be less bothered by it!
So I cut across two lanes, avoided several oncoming motorists and made a hasty but decent emergency right turn into the parking lot.
She looked disgusted and said "Why did you do that? The place is RIGHT over there" and pointed to an area on the other side of the street on the left of where I'd been. "Why didn't you turn left RIGHT THERE WHEN I TOLD YOU TO!".
Ah, I loved that girl (platonicly). She hit me with a shoe one time, but I still feel bad for who she married.
I "know" where my right arm is and I can feel it instinctively (as a right handed person, it's my main, default arm). But apparently my brain cannot map those words to directions in the outside world until it establishes a positional relation to my own body. I used to be ridiculed as a child for not knowing left from right until I developed the twitching trick.