I understand your concern (confusion?) and frustration. If you hang around CZ long enough you'll learn all this all 'typical'. I've seen this kind of activity happen to others (and had it happen to myself) at least 20 or 30 times in the past almost couple of years I've been here.
People are banned without explanation or accountability to others...or even to themselves (the person that was banned). Posts disappear whenever someone feels like making them disappear (usually when that 'someone' is cornered and has no answer, sadly), and the CZ TOS and posting guidelines have NEVER been utilized consistently or fairly. What applies to one CZer does NOT apply to another :( :( :(
Technically, there's something about 'criticizing CZ' (or something like that) in the CZ TOS...so there's really nothing anybody can do about it - because if you post anything critical of CZ, you can be banned for posting it...even if ones concern or question is valid.
I'd love to 'stay the night' and chat, but I've already wasted FAR too much time. I just popped in to see what was happening and saw Wombat about to leave and V was banned...so I felt it necessary to stay awhile. 'Time for me to get back to work.