The only explanation I have for this issue would be an incomplete breakdown of the controlled release mechanism of the capsules. It is possible that the beads seem fully pulverized yet are not actually small enough to solute into your mucous membranes. The only issue I have here is that, even if this were the case, there is only one direction for that material to go, down your throat and into your stomach.
Do not quote me on this, I'm referring to my own memory as a reference. I thought I remembered that most people who make an average attempt at crushing Addrall XR beads are going to end up with only 80%-85% as actual, instant release medication. Someone who maybe doesn't have the right equipment (you need a hard surface and a hard object to pulverize these, not a CD case or whatever) I can see how you could end up with an incompletely crushed product.