: From what I understand, the monster slots are independent of minor or major.
: What denotes "major" or "minor" is a little tag switch
: in the physics model. However, there could be some hard-coded physics that
: would be creating this discrepency. Maybe somebody knows?
If a creature is flagged as Major, and the engine wants to demote it on an easier difficulty level, it simply uses the previous slot. Likewise, a Minor creature that is promoted on hard levels simply gets replaced with the following slot. As far as I know, the major/minor flags of the resulting creature are completely ignored.