Looking at the general UA seatmap vs an actual reservation flight seatmap on 737-700 UA1108 on Dec 20th from IAH to SEA, it is only showing 2 rows of first class, is UA cutting one row of first class on the 737-700 or it is showing an A319 but the last row of economy row only to Row 31, so it doesn't match with the row number on A319 either. Any Idea?