[Admins]

Global staff please stop posting BAD script!

The original script is perfectly fine, but shouldn't be bugged.
The current script is not interrupted, so of course the if (created) should see all variables set. A "callnpc" is completely nonsense.
The only reason for the spawn function not working would be if you call it from a bad place, e.g. "with (anothernpc) { spawn(); }" because then "setstring this.type,Undead;" would not set thiso.type. Eventually replace it with
"setstring thiso.type,Undead;". Check in the script that is putting the npc if the string is actually set.