Datasafe/Datawrite Rigid Case sleeves - Scratching?

I got a couple of these:
http://svp.co.uk/product/datawrite_500_disc_dj_style_aluminium_storage_case_0185

They are Datasafe/Datawrite rigid ‘DJ Style’ cases.

I was initIally impressed.

However, I may have a problem.

I don’t know if I’m imagining it but a large number of the discs I’ve put in (156 so far) seem to be coming out with hundreds of tiny scratches all over. You can only see them when held up to the light. I’ve only had playback problems with 1 disc, but haven’t tested all 156 since I put them in.

The discs are in plastic sleeves with a paper centre that slightly resembles low craters. ie loads of little dimples.

Has anyone heard of this problem or am I fussing?

Thanks.