Scott, I think the problem stems from some sloppy name placement on the USGS maps. The name Mount Miller has been slightly misplaced on the provisional 1:63,360 USGS map (appearing around 8200 feet on the southwest face of the mountain), but the summit elevation of the peak is indicated as 10,750 (+50) feet. The 1:250,000 USGS map has also misplaced the name of the peak to an 8875-foot point on the southwest ridge of the mountain. The peak is at 60 degrees, 27 minutes, 37 seconds North, 142 degrees, 18 minutes, 5 seconds West in the Sarokin Glacier and Yahtse Glacier drainages on Barkley Ridge in the Saint Elias Mountains. It is the highest point on Barkley Ridge and the highest point in the Sarokin Glacier drainage. The nearest higher peak is more than 38 miles away.
On April 12, 1996, starting from the Kuleska Glacier, Carlos Buhler, Paul Claus, Ruedi Homberger, Reto Ruesch, and Charlie Sassara III climbed the southwest ridge to make the first recorded ascent. See pages 5 and 6 of the May 1996 Scree, pages 192 to 195 and page 380 of the 1997 AAJ, and page 79 of the 1998 AAJ for details of their climb. On the summit their altimeters indicated an elevation between 11,150 feet and 11,350 feet.
Mount Miller's second ascent came on April 26, 2002, when Bob Kingsley and Mike Lynch climbed a line on the northwest face starting from the Bagley Icefield. See pages 235 and 236 of the 2003 AAJ for details of their climb.
I don't know of a third ascent of the peak.
The various reported summit elevations can make it a bit confusing, but for now, I consider the most technically defensible reported summit elevation to be the one reported on the provisional 1:63,360 USGS map, 10,750 (+50) feet.
Hope that helps. Let me know if you need more clarification.