There is a lot of confusion. For example I always clean my jars and tins and peel the labels off but I know some others who don't. And I don't recycle butter tubs and yoghurt pots but I know others do.
I We have separate bins -one for paper/card and one for glass, cans and plastic. One day the van that collects plastic, jars and tins missed my bin, but when I pointed it out the refuse collector just tipped the contents into the next van that was collecting paper. So maybe someone (or a machine) sorts through it all later anyway, although in that case why have separate bins and vans?