Not to throw stones, but IIRC, you really need to be at 3300 (scheduled for production) for anything to matter. 2000 is accepted by GM, better than 1100. I'm not aware of 2050, unless you mean 2051? That's just a change to the order itself via the web (2030 is a change to the order). Pretty much a modified 1100. There's a sticky on the forums page I think that explains all the codes.
Also, IIRC, dealers could "submit" orders on 6/1 or so. Production wasn't expected to start until sometime in July, but GM being GM, seems every year that was pushed a week or two every week.