Yeah I also experienced this bug with pretty much the same setup: Glut revives a monster, revives a second monster killing the first, revivify on the first. Kinda funny. I had the thought that you could get an arbitrarily large number of followers this way, but I didn't do any tests (I think my temporary party size was 7. 4 + Glut + terrorbird + random named drow by the bark).
