You didn't make "a" mistake: you made about 25 of them.
Do NOT try to "delete" anything ... you CAN'T ... and if you read the tutorial or watched the DVDs you would know this.
Instead, read my post and DO NOTHING at this point. Can you just do that? Nothing? I will fix it myself.
If you want to do something useful, then please don't do anything, except WATCH THE GD VIDEOS like I asked everybody to
Thanks,
Jack