Shar, I recently found a bug in the 4th map of Legends of arkain, first Undead book. Having killed the three heroes, seeing the items (I even place shadows on the three, to verify), if I collect the first two, regardless of the order, the third one simply disappears, in all cases. Check it several times, and altering the order of collection. If it helps, my version of WC3 is 1.26.0.6401.
After that, i love your maps, all here looks perfect.