Hi BeerZ

Check if you have ticked "replace text as you type"

path: tools/options/spelling tab -> click on Spelling and AutoCorrection -> auto correct options

You will see the "replace text as you type" selection as well as the exact combination of keystrokes that are replaced with one symbol.

Also do you type smile exactly as you wrote in your post? because you have space between : and )

Regards,
Wries