posts (and threads for that matter) can be deleted by a mod for any reason-not just a tos violation. it could be that the post(s) in question (and no offense meant ) could be leaning to opening a "pandora's box" and it was nipped in the bud (i've had that happen to some of mine)

it could also be the the original poster has chosen to delete their post(s) (a lot of that happening now that omni is open to the public) tho i don't know how that affects subsequent quoted posts

as to post counts, i have learned that if a thread is moved to omni, all who posted in that particular thread will have their post count go down by the corresponding number of posts in the "moved thread"