That is a pretty complicated and chopped up signal path, which definitely increases the odds of problems when using HDMI.

Unless you have plans to add another HDMI source soon, my first thought is that the 990's switching is serving absolutely no useful purpose and is instead adding one cable, two adapters, and a switch to the signal path. Going straight from BDP-83 to projector is going to be cleaner.

Other thoughts, if you want to retain the switching, are to get a short HDMI-to-DVI cable for the connection from BDP-83 to Model 990 and to remove the wall plate and connect the 25-foot cable directly to the DVI adapter at the Model 990's output. This will eliminate three points of connection and about four feet of cable, based on your cable config description. I suspect the points of connection are posing more of a problem than the cable length.

When setting up the BDP-83, definitely set the primary output to HDMI.