Regarding the hero with 1300mp, I believe this contradicts the concepts of heroes (at least for SoD certainly!). It's possible that in the case you described, Alex bought a previously dismissed hero (perhaps not even by him) or a killed computer-controlled one, because when buying a dismissed hero, it is assumed he was without monsters, and in TE a hero without monsters has 1300mp, rather than 2000mp as in SoD.
Regarding the hero with 1300mp, I believe this contradicts the concepts of heroes (at least for SoD certainly!). It's possible that in the case you described, Alex bought a previously dismissed hero (perhaps not even by him) or a killed computer-controlled one, because when buying a dismissed hero, it is assumed he was without monsters, and in TE a hero without monsters has 1300mp, rather than 2000mp as in SoD.