There are two login servers, one for the version 4.4 server, which requires your EQ client to be patched to December 2002, and one for 5.0DRn which is compatible with a more recent client (which was broken with the last patch). The 17 servers is probably the total of 4.4 and 5.0 servers. You will only see the number of servers available for the version of the login server you are connecting to.