On an intuitive level, it isn't surprising that a chemical so similar to BPA that it could be an "easy" substitute would in fact also share similar harmful effects.

There are early rumblings (e.g. http://www.ars.usda.gov/is/pr/2009/090415.htm ) that there might be something similar going on with the replacement of trans-fats with palm oil. Palm oil behaves similarly to trans-fats, which makes it attractive to industry, but then it isn't too surprising that those same similarities might also make it similarly unhealthy.