Lack of appropriate funding leads to cutting corners to the point that some results may not be worth the price of the paper to describe them. I had a passing experience with epigenetics. Even experiments with basically free of ethics issues cell lines could be screwed up by using single end, too short sequencing reads. Combined with too low coverage, less than perfect controls it gives the input data I which the state of the art peak callers will just throw the towel. So the "trick" is to use some way more forgiving peak caller and get a rather crappy results.
Using the outdated human genome assembly (hg19), and old genome mapping programs just puts an extra cherry on the cake...