Really Roblox? Warned twice in one day?

Ok, so this time I am not sure how I got warned, I posted a forum post saying my YouTube Video. YouTube is not off-site, however that is not how I got banned. This is how:

It says "Don't post inappropriate topics on Roblox." Now I have produced about 20 video's in this format and this is the first time I got this type of warning. I honestly need more information on why I got warned then the moderators note that was given. Just glad I am not banned though.