Here's the thing, GoH. If you want to live here any longer, read the rules, or you might as well just leave this place before getting into deeper trouble.
Anyways, the reason why we don't double post here is because it gets annoying, messy, and plus, there's a handy "Modify" button on the upper right hand corner of each of your posts to allow you to edit posts instead of posting twice.
I was a newbie here once as well; didn't know what the heck a forum was, thought it was something like Neopets or something when I first joined. What are rules? Didn't know they existed, though hopefully it was common sense, either that or merciful mods and admins, that let me live long enough to tell you these things.
And how do you know what rules you've broken if you haven't read the rules? I can easily summerize them: don't double post, don't post short, pointless, annoying messages (AKA SPAM), don't make fun of others/don't be mean/repsect other members, don't use cuss/swear a lot, don't overuse smilies use good grammar and spelling (if you have trouble here, Microsoft Word helps), and basically, use common sense. If you can't follow the first ones, then the last rule, "common sense", should help you. Really.
Also, by the time you've learned them all, it's quite likely you've been banned. XD