I think people have to remember there are only 15 stadium shows, roughly 300,000 tickets. There is a huge demand. In all likelihood more shows will be added, plus Europe for sure. If it goes like it has before your codes will be good for the added shows. Don't panic yet.
On the I&E tour there were 8 shows in NYC and 8 in London, combined more than the current 15 shows announced. So for NYC there is a huge demand, clearly the demand is greater than the supply.
The schedule has room for more shows, I am sure more will be added.
I think they only announced the 15 shows and are testing the VF system. Hopefully they can make the corrections, announce more shows, give out more codes and make more people happy (not likely to make everyone happy).
Prices are in line with other major acts, check out the prices for the Eagles for Paul McCartney!!!