I have already explained this once.
Policies change. At one time we excised every post, even when we banned/suspended a person from the board. We no longer excise posts of the suspended people. We do this so we can point out why they got suspended when they email us and ask why.
I am not going to explain it again. If you cannot understand it, then contact me privately and I will be happy to go through it all over again and again, until you get it.
This should have never been brought to the board, to begin with.