Perhaps some of the responsibility to clarify fitment should fall on H&R. It's helpful that Stillen has special notes on their website but they can't list everything unless problems like this are brought to their attention. And you're right, Stillen is taking appropriate steps to take care of the customer.
i bought DRS all around because I was prepared to replace the studs. I was really considering DRM because I did not come across anything that said DRM won't work in front till now, and I did my research. But we learn and move on...that's why we're on forums like this...sure makes an enthusiasts life a little easier.