Not really a bug, but:
The Lit Bomb and Lit Super Bomb weapons are still listed in the weapon drop down box, but in the case of the death weapon offset, these unused weapons are skipped, so here are 2 examples:
If the weapon is bomb and I set the offset to 5 for flame, it instead uses flame 2
If the weapon is super bomb and I set the offset to 6 for flame 2, it instead uses the as yet unimplemented ice magic.
The Lit Bomb and Lit Super Bomb weapons sort of threw me off since they are apparently skipped, but then I had to reduce the offset by 2 to get the death weapon I wanted.
In other words, it would be a good idea to remove the Lit Bomb and Lit Super Bomb weapons from the weapon drop down list, so that way, people don't get thrown off by them when setting the death weapon offset for enemies with the 8 shot death type or the dashing weapon offset for the explode death type.