I'm having some of the same problems. In the training tutorial I use the GBU-12 first, and I kill the target. then I go to the GBU-38 and do the same. Somehow in switching back to the laser-guided bomb something goes amiss. I make sure I use point track mode, then make the target SPI by using the TMS UP LONG command, and carefully line up for the bomb drop from at least 8000 feet AGL. But the bomb merrily drops in the middle of a field. It's a little difficult to accomplish the goals in Instant Action when I can't get some of my bombs to work.