Being unhappy would be natural and expected behavior from a 55 yo man.

There are many segments and each segment has different behavioral characteristics and different housing requirements.

I actually felt physically ill, since this was behavior I'd never experienced in an office environment.Jon is right, you'll learn to let it roll off after you've dealt with it more than once.

@Roy Oliphant - CAP Rate is a market metric which illustrates the behavior of the marketplace.  

(Another FYI, section 16.2 spells out YOUR options if they don't go through with the deal.)Also, in light of their recent behavior, unless contractually obligated at this point I would NOT rent it back to them.

Has other sellers seen this type of behavior from lenders?

When they pay for the power bill, you just don't see that kind of behavior. 

I now find it difficult to trust a company with such questionable behavior moving forward.

Background, criminal, credit/debt, income checks all displayed in a single dash to help you make a much more holistic decision.

If they were I report their behavior as a PM to the local realtor association because that level PM is not allowed.