It certainly wouldn't have been the bipolar (unless that, too, was a lie of convenience), any large organization has an H.R. department, and H.R. people get the willies real bad anytime anything that smells like ADA crawls around - they might have started making sure that everyone wrote down whatever disciplinary comments they had to make, and documented them (e.g., with witnesses), mainly to protect their hinies from ADA liability, which may have collaterally led to your firing because then they would have had a good record of your malfeasance.