The coverage of the Tucson memorial from 8:39-9:20PM wreaked havoc in the broadcast network's primetime lineups last night, with a lot of unannounced, last minutes shifts and pre-emptions. The chaos may have taken a toll on the premiere of ABC's new drama Off the Map (2.2/6 in 18-49, 7.5 million viewers), one of only 3 first-run shows last night to start at their scheduled times.