9.8 Individual mission changes

eekeeboo: I really would like to know if you have a mission currently completed, whether it will still be completed if it's a different number, or whether you keep the mission number completed.    For example I finally did MT 9:incinerator for the 260 today...... after the patch it becomes MT:12. I really do not want to have to do re-do the mission, if it is the case of numbers rather than actual mission I will spend my time trying to do the toon mission now!