Dichotomy

    I am so conflicted.   Current resume protocol deems placing two spaces after a period as indicative of your being aged, yet my computer program lights up as an error if I only leave one space.  The United States Post Office  recommendation is to omit punctuation in addresses, but if I don't put a comma between city and state, not only does it violate everything I was brought up to grammatically believe in, I'm afraid others will think I'm stupid if I do so.  I just don't know what to do anymore.