It is called not proofing your writing!  Spell checker would not flag that one after all.

I figured it was just a careless typo and that you knew what the phrase was, just wanted to point it out so you can edit it.

let me know if you prefer that I don't do that, some people are offended by such corrections for some reason. (not me though, please correct me whenever I am wrong)

I had not thought to do that (the edit feature did not work for so long, I rarely think about it).  But I have done so, and gave you credit.  And I do not mind being shown my atrocious typing and spelling.  But it can get in the way of a good discussion since I make so many typos and spelling errors.