Yes, I agree with everyone else. It is called POWER STRUGGLE and you are in the middle of it. I would have
brought the issue to both at the same time, when one of them disagreed.It's not for you to decide. Let them fight
or discuss it, that is what they are getting PAID FOR.

I am sorry but there are always problems with one person
or another, at any job.It is everywhere.I'm sorry you had to
experience the cruel way people express their position
at the job. I went through H--L with my last job. I eventually
after 6 1/2 years of harrassement,hostile environment and
discriminaton, decided to leave and file a lawsuit against
them. Because I knew that their only intention was to fire
me.Even though, I & my superiors had received several letters of recommendations, stating that I was an excellent
employee. I cried alot of times,but I didn't let anyone see
my tears! I did win the lawsuit, but only because of
the American Disability Act. They knew that I had depression and stress due to the way they treated me. I had 2 medical leaves from my shrink.

HOpe this info helps, and if you can find peace at a new job,
let me know. I am between jobs.

Wishing you the best and please take charge of the situation, even though it is very hard.

TAKE CARE!