I assume my post was deleted because the other member was banned and not because of anything I did per se. I didn't get any notification about the post and didn't notice it was gone until I got mentioned again. (I wondered why no one responded to my post, but you never know what people are going to be interested in. You can't take it personally if no one cares. ) If I was being rebuked, the message was unclear.
I suppose your post was deleted simply because you were quoting/referencing the deleted post and it then didn’t’make much sense keeping your post. That’s how I see it. I administer a forum myself and that’s what I would have done also. It’s only to keep the thread coherent. Nothing more.