You guys may be correct about the depth of the haft. They may be better off hafted deeper.
As far as hitting square on, I like to bare shaft tune my arrows with the same weight field points to achieve proper spine, good flight, and straight penetration. This is what I did with these arrows before fletching. After fletching I continued to shoot them several hundred times to get comfortable and familiar with the arrows. When I felt comfortable, I removed the field points and attached Scott's points (same weight) and shot them many times over into a bag I have intended solely for stone. It is a canvas drop cloth that I sewed into a bag and is STUFFED with plastic grocery sacks. Nearly every shot these arrows blew completely through the 2' thick bag and into the dirt (i know, not the best thing for an edge) and I didn't have any issues with breaking one. Now, after several dozen shots, both points wobbled a little where the pine pitch glue was holding them, but I just reheated a set them back straight.
Bottom line is after all this, I feel comfortable using them as they are. But, I do appreciate the criticism.