I think part of the problem is the version of weidu in the EOU pack - getting on six years old now
Seem to recall there is/was a way to update older versions of WEIDU to the latest release. (bit rusty on the IE games)
You could retry EOU without installing the random treasures mod, or give the G3 IWD2 tweak pack a bit of a look-see.
http://www.gibberlings3.net/iwd2tweak/