There are two types of $45 tickets, the floor (General Admission or GA) and actual seats on the upper balcony. As such, over half the available tickets were indeed $45. Of course, all the media does is focus on the $130 tickets while ignoring the fact that fans have a choice of what type of ticket they want. Plus, the $45 GA tickets really can get you VERY, VERY close to the band. So the best spots are also the least expensive.
On the Propaganda order form, there will be a spot to check for $45 GA tickets or $45 "regular" tickets (those with a seat). Make SURE you check the right box. If Propaganda runs out of tickets for the show you requested, then please have an alternative. There will be a spot on the order for to request an alternative - however, if they run out of tickets for your alternative as well, they may actually call you. In that case, have yet another back-up plan in mind. For example, you might want to attend the same show, but just have the $85 or $135 tickets instead. Or you might want to try getting GA tickets at another show.
Remember though, obtaining GA tickets is just half the battle. Then you have to queue in line outside the arena in an attempt to secure a spot in or just outside the heart. Be prepared to wait outside most of the day. In some lucky cases, people from the end of the line still got in the heart. However, for the most part, people who arrive late will not be inside the heart. Also, there are only so many spots along the heart railing. If your goal is to be along that railing, then you must be one of the first people in the heart, meaning you also have to be one of the first people in line (usually first 150-200 people have their pick of where they want to go).
Bottom line, Propaganda will do the best they can to secure you the ticket you requested. Have back-up plans in mind. And if you get the tickets, remember, you still have to do some "work" to get a great spot in or around the heart.