BUSA hasn't stopped making them. They're certainly making M9's for the miltary.
It could be BUSA is just tied up making the M9s and is bringing Italian guns in to take up the slack in the civillian market. It could also be that the Italian factory made too many 92FS's, and it's easier to sell them in the USA than in Italy, where you can't own a military caliber gun.
The "Acc,Md" is required by law, as technically BUSA is the importer and the importer has to stamp that on the gun and it has to be visible. The "warning" B.S. sucks as well, but lawyers will win out on that one.
I personally haven't found any quality difference between BUSA and Italian guns of recent make.
I haven't seen the Italian guns you mention, but there's several good reasons they might be doing this, and BUSA certainly hasn't quit making the 92FS.