That’s pretty much standard among servers. It makes no sense to me that someone gets banned for modified client, but only in the Zombies dimension, and are free to continue modifying their game in other dimensions like Survival or PvP only to get banned from those after, so instead of that they should just be banned from the server itself; it guarantees that they know they’re banned and that they can’t continue to cause harm. It’s the same thing for all rules, that’s why you get banned from the entire server instead of just sections.
Can you read the rules and quote the rule(s) you broke? Do this in a new reply, don’t edit your appeal. If you do not know how to quote the rules, read the guide How to quote the rules.
If you do not identify the right rule(s) that you broke or you do not know which ones you broke, I can make it clear.