The reason that you see Smogon University with 150/100 is that the Metaserver, which manages the listing of servers, is down right now (150/100 doesn't have any real bearing on the number of users). Since Smogon is by far the largest server, that entry is provided for convenience. If you are trying to connect to a particular server, try using the advanced dialog to manually enter the information until we can come up with a more permanent solution.