Some people have problems with the clamping force of some Senny's.. I would say give them a bit of time to loosen up.. on my HD6XX the pads don't touch when I lay them on my table and I have pads that are taller than the stock ones. They're mostly plastic and foam too, but very comfortable. I am guessing the 560s are at least a little similiar to my pair.

So I would say give it some time, that is if you like their sound. Wearing headphones in is definitely a thing from my experience.