I believe they are making sure there are no issues since this is really a public beta test, with only a few people having two Hopper snaps.So after a 4 month wait for the fix for the 2 receivers, now dish says only one snap per household? What was the point? If they are only going to send out 1 per household, it could have been done months ago.
Once they are satisfied with the test I am sure they will allow two. Remember these are devices meant to keep people as DISH customers... they are not going to hide them from people. They just want to make sure all is good.