Substitutions acting strangely.

Apologies if this has already been brought up elsewhere and/or is easy to fix myself!

I use substitutions a lot for notes and usually they work fine, but I’ve noticed sometimes they’ll correct to another word that’s just not right.

One example is the word “Minoan” - I’ve got substitutions set up to replace “mino” with “Minoan”. Except what it actually comes out with is “Minoran”, which isn’t a word. I think it might be because I’ve got “correct errors as you type” switched on (I’ve got problems with my left hand and it saves a lot of time when half my fingers aren’t working…)

Is there a way to get round this? Tried adding a substitution of Minoran for Minoan but that doesn’t seem to work! Thanks.