[manikus]

For the problem with the weapons/armor, make sure that the item is not cursed (I'm pretty sure you've already done this.) Try to do it in the engine again as a test and then upload the error log here. The error log is in the UAFWin folder and there may be one in the UAFWinEd folder, depending on how big and bad the bug is. I tried to duplicate this on my DC set-up, but couldn't. I presume you're using a modified items database?

For the spell, remove the "+" in front of the 10. When you tested it as a cleric spell in combat, was the subject at max hit points? If so, it wouldn't have added any more (with that script alone, there are ways to temporarily raise max hit points).
If removing the + doesn't work, export the database (done through the database editor menu) as a .txt file and post here so that I can try it on my DC.