Greetings 55alyssa,
I think you should ask your brother why there is some illegal third party modifications to your game
(in other words, you have a anti-fall hack)
You failed to fall from your pizzabike at multiple occasions when you should have been. That is why I conducted a series of test on yourself to be absolutely sure that you were hacking before banning you.
And if that is not enough for you, when your brother asked me to leave you alone, I asked him: "Why does your sister use hacks" and he answered (twice) : "so what, its none of your buisness", admiting it blatantly.
Now let me be clear I was going to ban you, even if your brother did not plainly admit it for you
I believe your brother owes you an explanation.
Come back when you have more info on what really happened, I will be glad to hear it.
Have a good day,
SlyFox