Lost Archipelago bugs

First, I want to say how much I enjoy your games! The Quest demo hooked me and then I got the free expansion Lost Archipelagos. I am very deep into the game but unfortunately there are many bugs that prevent me from finishing the quests. One of them is killing the spirits of death. I have killed them all near the prisnia area, but the guy kept asking for my help. Next, the dwarven leader. HE CAN'T BE KILLED. None of your blows, magic, or arrows can fell this dwarf! Not even detect mind works! Another is the keeper of the Lava field door. I can't open the bloody door, no matter how much i press the door! Finally, beyond the house of the lava keeper are the green buildings. There are "guardians," freaky undead flying things, that project some random glowing stuff from their fingers (?!) You CAN'T hurt them without causing a MASSIVE bug that will crash your ipod, sending the game into permanent freeze unless you press the home button, and you have to wait a minute for the game to fix itself. I tried using a sword by approaching them, but their one hit kills (curse?) kill me immediately. Detect mind does not work, in fact, projectiles cant be used at all without the crashing bug. PLEASE RESPOND, I am a big fan of your works, and if Civil Striker is reading this, PLEASE HELP!