Being a paying customer doesn’t exempt you from punishment for breaking the rules you agreed not to break. My guess is you know exactly why those names were changed. Just because a name makes it through the name filter doesn’t mean it’s ok to use.
Chances are someone reported the name while you were logged in, a gm saw the report and agreed that the name needed to be changed. Thus you were forced to change it.
So you used the same name that lead to a forced name change and you’re wondering why?
Just because you can do something, doesn’t mean you should do it. Use this as a good life lesson for the future. Be thankful it was only 6 days, repeatedly breaking the rules (or in this case the same rule) can propel someone up the penalty volcano.