Stopping SEPM from dishing out updates/upgrades

I have an issue where SEPM is hogging up a ton of bandwidth and had to disconnect the server from the LAN.  Automatic upgrade schedules have been disabled.  GUPs are capped at 64 kbps and 5 machine max for downloading.  The moment I enable the network adapter on the server, it queues up a bunch of different machines for updates.  I'm wondering if there's a way to clear the existing queue and just have it revert back to the configured schedule.

Thanks.