Increasing Typing Stability.

IDK happens to me too. Jsut thign taht, etc. It never feels wrong to me when I type those words thee wrong way.

Yeah I do it too, especially when sitting on my bed with this laptop on my lap. Oyu instead of you, jsut not just, etc. I also sometimes capitalize the first two letters of a word. This is the exact reason I always proofread, at least for school things.

There's a small possibility it's actually your keyboard. To test, you can hold down both shift keys, and type:
The quick brown fox jumps over the lazy dog

If it works, you should get that sentence in all caps. If not, it may be because your laptop's keyboard doesn't have NKRO.

HTH.

I still do it, and have a mechanical.

It depends which mechanical you get.  I have the cherry mx clear for example, which is intentionally such that you barely brush a key and it triggers.  This is because my particular typing problem is that I miss keys on a not-sensitive-enough keyboard.  I'm not a soft typist by any means, but when deviating from home row I only really brush some of them.

But some of the other cherry mx variants will only trigger if you bottom out the key entirely.  I don't remember which.  There's like 6 of them.  But it's easy enough to look up.

This won't fix the inversion problem where have is ahve.  I don't think there is a fix for that other than spellcheck or typing slower.  I at least can focus explicitly on my typing sometimes and get it right consistently that way, but that's not useful in a context wherein you're actually trying to do work.

Typing slower will certainly help. The issue seems to be that OP is typing faster than they're thinking through what they want to type. Even if you intend to type out "just" your fingers are jumping ahead to letters appearing later in the word, so you get things like "jsut" or "juts." I think there's even a name for this phenomenon, but it's slipping my mind.

Cherry MX Blues are the best for tactile response; however, they are loud, clicky, and not great for work environments. I have a keyboard that uses those switches and another that uses silent reds that is significantly quieter but lacks the tactile feel of pressing down on the keys. Fortunately they don't require fully bottoming out so that makes it nice. The more common ones (blue, brown, red) have 2-4 mm travel distances to actuate which is why they're so common.