It would appear that one of the images (which is being used to determine some stats) is somehow incorrect.
In such cases there is no real need to run build. For the Pixel sizes check that the Min,MaxPS values in the table make sense. Also check that the Service output properties are elevation. If there are concerns about the boundary being incorrect the re-build the boundary. You should be able to see the imagery. With elevation data, the issue often is that the stats make little sense. Best is to set the Min,max values for the renderer in ArcMap when you display the imagery vs using something like StdDev which has little value for elevation. The other issue may be that overview have not yet been created. Not for elevation data if it often advantageous to use other data for the overviews (eg NED data from USGS or SRTM data) both can be downloaded.