Need some help in understanding the BG command ladder

Howdy,
As many books as I've read the last couple of years and the hand full of movies, including the TV show, 12 'O Clock High, I'm still rather perplexed on how the command ladder at the BG worked it self out. From looking at past threads on the forum, the only thing I found was this list from 1941; so it's pre-war. I'm guessing things shook out a bit differently when war came a knocking. I'm not as interested in fleshing out all the differences as I am a few specifics that I have questions about. So here we go, first with the list, and then the questions I have.
 
Command structure from summer 1941
A Hq and Hq Sq, Bombardment Group (Heavy) (dated 1 Jul 1941)
Total of 24 officers, consisting of:
1 Colonel, Commanding Officer
1 Lieutenant Colonel, Executive Officer
3 Majors, consisting of:
1 Group Operations and Intelligence Officer
1 Group Material Officer
1 Headquarters Squadron Commander
8 Captains, consisting of:
1 Group Adjutant
1 Assistant Operations and Intelligence Officer and Navigator
1 Group Intelligence Officer
1 Group Armament and Chemical Officer
1 Group Communications Officer
1 Headquarters Squadron Operations Officer
1 Group Surgeon (from Medical Corps)
1 Group Dental Surgeon (from Dental Corps)
8 First Lieutenants, consisting of:
1 Group Assistant Adjutant and Personnel Officer
1 Group Assistant Operations and Intelligence officer
1 Group Weather Officer
1 Headquarters Squadron Adjutant
1 Headquarters Squadron Transportation Officer
1 Headquarters Squadron Engineering Officer
1 Headquarters Squadron Copilot or Navigator
1 Chaplain (from Chaplain Corps)
3 Second Lieutenants, consisting of:
1 Assistant Material Officer
2 Headquarters Squadron Copilots or navigators
1)      Firstly, was a BG always overseen by a brigadier general, or could it also be a colonel? If every BG was overseen by a brigadier general, was the Brigadier General living on base, or was he residing elsewhere?
2)      Beyond the air and ground execs under the colonel, who was in charge of the 4 individual squadrons? Was it always a major, or could it be a captain, or even a lieutenant?
3)      If so, did these squadron leaders have their own offices, or was it a floating sort of an office?
 
I’m sure I’ll have more follow-up questions.
 
Thanks once again in advance for your help!
 
 
 
 
 
 
 

Many thanks Marc for your help in understanding how it shook out in the 94th, as well as how it probably played out in other BGs. It sounds like there was a bit of flexibility based on need and experience and not as much on rank.
 
It was obviously a very amazing time in our military's history when a lot was happening very fast and had to happen in the AAF without the luxury of time.
 
Thanks again!

Good insights Mark. Thanks. The process and procedures for filling the gaps that were a daily reality sounds like it hinged somewhat on rank, but more on who was available and had the qualifications/experience to step into the position of leadership.
 
As Marc, pointed out, that at least for the 94th, each squadron had its own office. I'm guessing that the squadron office belonged to the squadron lead who was at least a captain?
Do you know what sorts of things happened at the squadron office level, what purpose it served and who served in it?
 
Thanks again!