Alura ( lvl 75 Ice) was in the sun position (first), Myrna (lvl 72 Fire) was in the Eye position (second).
Alura casts blades, Myrna cast Fire Dragon. Next turn Alura casts Ice Angel enhanced with Collosus and Myrna casts Detonate. Detonate grabs the Ice Angel DoT which is what was expected, but it gives the damage for the Fire Dragon (only 305 left). Fire Dragon continues and does it 305 over the next to rounds, meanwhile the Ice Angel which should hav done about a thousand DoT (with boosts and blades) is just gone.
Detonate works fine if there is only one DoT active.