Hello Cody, thank you for creating a report. I have reviewed your case and this is the verdict:
While I do not see the sign as against the rules, I agree it can be misleading and I will talk to Derpza about changing that in the future.
Yes, you insulted him. No, he shouldn't of kicked you for it; if anything a gag or mute would be more appropriate if it was disrupting the sit. As a past staff member, you should know insulting or provoking the person trying to deal with the sit does not help (see below).