Throttling is not working as expected in MacOS

[sakpilot]

I have installed and configured Comcast version 1.0.0 on my Macbook. I ran the below command to simulate 10Mbps; after that, the network became too slow, and when I checked the network speed via fast.com , https://www.speedtest.net/ or the mac native command 'network quality,' It is showing around 1-2 Mbps only. what is going wrong here, any other settings i need to focus?

comcast --device=en0 --latency=25 --target-bw=10000 --default-bw=30000 --target-proto=tcp,udp --target-port=80,443,49152:65535