Hello Da Flarf,
1. since version 0.4, when the character is wielding a large weapon (one that does not fit in the single image spritesheet), the app creates one file for each animation.
Creating a spritesheet with large weapons, would create a extremely large file with mostly blank space.
2. The creators of the LPC sprites created almost all weapons only one animation. Only a couple have more than one animation (sword, halberd and dagger come to mind).
If the app doesn't show the weapon in that animation (in this specific case, key '3') it will not be on the image.
Hope this clarifies the issues.