I play Moroblivion v. 063. When doing Imperial Legion quests, I have encountered a few bugs.
Suryn Athones' Slanders: any mention about "Slanders" makes him and surrounding Ordinators attack the hero, +40 bounty. Killing Suryn: 1000 bounty, +1 Infame. Workaround: make sure there are no other Ordinators nearby, lock all dors using Fenrick's spell, mention Slanders, kill Suryn, use console to clear bounty and Infamy. Bounty and Infamy are given even when killing under 100% Chameleon!
Saprius Entius: when you talk with him, he says to look around. Two Ordinators appear (as expected) but they are non-hostile (strange!). Saprius will not do anything until they are alive. I was not willing to get 2000 bounty and +2 Infamy, so I locked all nearby doors (to prevent any other Ordinators from coming, anyone from leaving or Saprius from going to some hidden cell) and summoned (via console, PlaceatMe) a Xivilai. Two Xivilais were enough to get rid of Ordinators and Saprius is marked essential :)
After Grandmaster duel, the hero is proclaimed the Knight of the Imperial Dragon but also is expelled from the Legion. This is probably the same bug (associated with the new guild expelling mechanism?) as with duel with Trebonius and appriopriate fights in Warriors Guild, described by me in some other thread.
S.

Thank you for the reports, I
Thank you for the reports, I will take a look at these quests.
It is a little strange that you get the bounty even when NPC attacks you first. Do you have other mods installed besided Morroblivion?