Just to show you I'm not kidding when I say it's causing the clients to be shoved towards the server with the lowest IP in the pool (in this case being nova), here's part of a /map output. I've removed the exact user counts cause one of my fellow admins didn't want me to paste them here (don't ask me why...).
shire.sorcery.net --------------------------- | Users: ( 7.9%)
`- rivendell.hub.sorcery.net --------------- | Users: ( 0.1%)
|- nexus.sorcery.net ------------------- | Users: ( 9.9%)
|- iuturna.sorcery.net ----------------- | Users: (11.6%)
|- nebula.sorcery.net ------------------ | Users: (12.7%)
|- terra.sorcery.net ------------------- | Users: ( 9.3%)
|- wraith.sorcery.net ------------------ | Users: ( 0.0%)
| |- luna.sorcery.net ---------------- | Users: ( 5.2%)
| |- nova.sorcery.net ---------------- | Users: (26.1%)
| `- bonzai.sorcery.net -------------- | Users: (16.8%)
`- services.sorcery.net ---------------- | Users: ( 0.4%)