When Carter visits O'Neill at his house and the shots switch back and forth between Carter - with O'Neill's house in the background - and O'Neill standing near his grill, the door seen behind Carter varies in how much it is open/closed from shot-to-shot.
SGC is 2,000 feet underground, but Sam's civilian cell phone still has reception. However, it is likely that they would have installed repeaters, for the convenience of their staff.
The editors of The Ascended Times are not all-knowing as there are numerous spelling errors in the newspaper Daniel reads in the "diner." Perhaps the most blatant is the spelling of "Consciousness" in a headline as "Consciouness".