Hello Faraz,
I am glad to hear that you were compensated.
This happened because the brokers offer the futures price. Not the spot price.
Anyway, regarding the brokers…it is up to you. I am a bit skeptical of IC Markets because some students reported losses with my EAs, while they were actually profiting with me on JFD, for example.
But you can give it a try.
Also, if you are satisfied with your broker (Interactive Brokers) I do not see a reason to look for a different one.
The margin is like that with most brokers, so it is not something special with IC.
Cheers.