The edit you would have done is too minor, as you were just changing due characters to fix the spelling of question. The other edit was not necessary, except (probably) for allowing you to suggest an edit.
That possibly sounded, to who reviewed the edit, as a way to circumnavigate the limit of 6 characters. The reason there is the limit is that the suggested edit is going to be reviewed, and it should be worth the time spent from who reviews it.
In general, I would suggest to avoid small edits, when they are reviewed from other users. There are some cases where the suggested edit would be acceptable, though. Suppose that you saw a post with a link that takes to a 404 error page, and you find the correct link; in that case, the suggested edit could be accepted, even if you had to change a word that didn't need to be changed, especially if you note in the comment that the change was to fix the wrong link.