There is a typographical error that I make and do so every time I try to type a certain word. Whenever I try to type remember, I type remeber. I do this every time. This is different to a regular typo because most typos happen at random, whereas this mistake is guaranteed to occur. It's not a spelling mistake, because I know how to spell remember, I just don't press all the required keys.
Could it be related to touch-typing? I don't make the typo when I peck out the keys.
I wonder whether it is related to muscle memory, because there are many words with the pattern 'e_e', such as here, there, gene, theme, scene, etc. So where I reach the second e my motor system is primed not to push the key that came before, i.e. m.
It seems that knowledge of spelling and knowledge of typing are not strongly linked in this case.
Is there a mechanism by which I have learnt this mistake?