[Edi]

That's probably because there is more than one monster with the same name and it picks the one with the lowest ID number from the list. The same thing used to happen with assigning magic sites by name to a map in Dom2 so that you could only assign the Fire Academy of High Magics, never Air, Water or Earth.

Just try wishing for Heavy Infantry or Infantry of Ulm or Light Infantry and I'm certain that you're going to get #38 for HI, #28 for LI and #67 for IoU, instead of #40, #29 or #71 respectively.

So it's not a bug per se. The game just doesn't know which one of the different options you want, so it provides the first one that fits the name.

Now, wishing for "monster <id#>" might work, but somebody needs to test it first...

Edi