Alright, I have no idea where and how you arrive at some of what you describe as the normal process.
Now you seem to have progressed on to saying that " normally when an FBI agent is fired there is a confirming statement from the IG." As if to say that the IG normally weighs in on the firing of all FBI agents. They do not. Most firings do not involve the IG at all. He is not part of the process at all unless it arises as part of his investigation and the AG or designee makes the final decision based on but not limited to the IG's referral.
In addition, I think I already pointed out that Sessions quoted from the IG's referral as part of the announcement. You are chomping at the bit so hard that you are assuming that if something is not available to you personally on the weekend that it will not be available soon in normal order. And as I have said, elements of his firing are part of a criminal investigation so you will not see the whole thing at this time, nor do you have a right to see it. The IG made a referral, the internal designated personnel committee reviewed it, additional personal testimony and pleading was received from McCabe and then the deed was done. You may find out more next week or you may find out more if there is committee hearing, or you may find out more if he is indicted or you may find out more through the daily leakings. But you are pulling all sorts of rules out of thin air based on what you want to see but how you feel does not establish a rule.