Yes you are right.....they have delayed the A350 deliveries. So it looks like A330's delivered in 2013 instead of A350's although they are currently looking to move the A330's earlier to replace some 767's.
underpants
"US Airways has definitive purchase agreements with Airbus for the acquisition of 134 aircraft, including 97 single-aisle A320 family aircraft and 37 widebody aircraft (comprised of 22 A350 XWB aircraft and 15 A330-200 aircraft), of which 30 aircraft were delivered through December 31, 2009. During the first quarter of 2010, US Airways took delivery of two A320 aircraft and two A330-200 aircraft, which were financed as discussed above. US Airways plans to take delivery of 24 A320 family aircraft in 2011 and 2012, with the remaining 46 A320 family aircraft scheduled to be delivered between 2013 and 2015. In addition, US Airways plans to take delivery of the eight remaining A330-200 aircraft in 2013 and 2014. Deliveries of the 22 A350 XWB aircraft are scheduled to begin in 2017 and extend through 2019."