These bugs have been reported previously on ModDB, regardless thanks for the report! The bugs have been listed on the dev log and will be fixed in a new version.
Disintegrate either kills units (+ damages buildings) or does nothing. It can't damage units if it fails, perhaps it should? We're having trouble fitting spell descriptions in because the amount of text goes outside the hardcoded range. Relax, this is yet another thing that will be fixed in a future version! Until then, we'll try our best to improve the spell descriptions.