Making a Weapon Deal 2x Damage to a New Monster Type

With BIT #$20 set, which I believe is the flag right after the 'is human' one (need conformation), when the weapon in question attacks a monster, it breakpoints in the debugger, but it always will branch past the double damage part. If I use BIT #$10, it will do the double damage part but for both 'is human' and 'is dragon', so that's not right. I'm fairly sure BIT #$20 is the correct one for the flag right after Human, but tis not working.

About that y value bracket, that's not a typo, that's how the debugger is putting it, but I have no idea what to make of that as I have extremely little assembly/coding knowledge myself lol.

This Heal Rod extra effect seems okay to use for it, as it is being picked up in the debugger for the weapon in question,
but my new flag for the monster being a dragon is not and branches to the return...