How to understand the concept of moles?
I had the same problem as well, until I sketched out the actual molecules.

When you have one mole of $\ce{KOH}$, you have one mole of the collective "molecule".

If you were to break it down into $\ce{K}$ and $\ce{OH}$, you would get 1 mole of $\ce{K}$, and 1 mole of $\ce{OH}$. This is because you need 1 mole of each to make 1 mole of $\ce{KOH}$.

It's kind of like if you have one hundred keyboards, you would get one hundred 'Enter' keys, one hundred 'Up arrow key' and so on...