Why is my speedtest showing unexpected results?

Standalone mode: The device uses session-based load balancing. A single-session speed test measures the WAN link carrying that session; it does not measure bonded capacity. A speed test using multiple independent sessions may use several WAN links. Check the performance view to see which links carry each test, and compare their configured rates. To test packet-level bonding of a single session, use peered mode with the Broadband Bonding Service or a customer-hosted relay.

Peered mode: In peered mode, you should be able to see the aggregate speed with most common speedtests. Please make sure you do not have an interface binding rule that forces the test traffic to go over only one WAN link. Also please make sure the “capture all” mode is enabled for your “Remote LAN”