Another problem with filters

It's me again - sorry! There seems to be another bug in the filters - they don't seem to mesh with the premium services. For example, when I use the browse function and put in filters for the usual stuff (genre, word count, open, no fee, vibe, country etc) all is working, but as soon as I add try to filter by piece (premium), the country filter stops working. I've tried it with a couple of my pieces with the same result each time, so that would seem to be where the bug sits.