If you are sloppy in one area of your life chances are you are sloppy in others..that being the case if you don't care enough to check your spelling, grammar, and punctuation, in posting an ad for employment then how can anyone take you seriously?
Tell me ablcabltek, if you were having business cards printed with your name and company on them would you pay a printer that misspelled either one? According to what you posted if you complained about it you would be obsessing over it.
In the business world spelling, grammar, punctuation, neatness, professionalism all count and when you place a ad looking for employees you should pay attention to all of them.