Welcome to the forum!
The rules may not be crystal clear but this statement only cannot support your title!
Why a single player has to own multiple buildings? Especially in official servers that’s not allowed 
. It’s not something new, it’s getting old already!
Don’t take me wrong, i respect the builders of the game, but even if the rules are not crystal clear, multiple buildings on official servers is clearly a ban situation. The only reason you haven’t been banned so far it was because nobody reported you so far! And if others with greater builds are not banned yet, is exactly for this reason and no other!
Make your self a favor
Read this…
Try to avoid all these and be more careful, because from older posts i read so far if you get banned once the second and the third are coming “easier”. If you disagree with the way people get banned, that’s another story, make your suggestions and you will get the support probably from us, the players!
I am sorry for your ban m8, if you love building however, i would suggest you private servers! Welcome to the forum and good luck!