I'm not going to sit and crunch your numbers, but just glossing over it I'm sure there are some errors there.
Nevertheless, I will start with your presumption at the end of your post, which presumes that Offor has a very good chance of getting a controlling interest through this offering, and whether they planned this scheme all along.
The answer is:
Yes, Duh.
One has to think in the alternative here. If they didn't go this route, then there would have been a private placement and Offor would still get the same result.
They are being nice to us by allowing us the chance to participate.
Get it?
Krombacher