Interesting/strange.
In any case I highly recommend that you purchase EN ISO 13485:2012 instead of the pure ISO 13485:2012. Much better value since it includes the ISO version and the recently updated informative annexes.
I always check with
BSI to get the scoop on EN/ISO/IEC standards but I tend to purchase what I need through AAMI (cannot get EN's from them though) or the
Document Center in California, USA. I recently compared pricing between BSI, Document Center, Tech Street and IHS Global for this standard and unless you are a BSI member, the Document Center had the best pricing.
AAMI has the best pricing for medical device standards on planet earth if you become a member and then subscribe to their standards on CD collection.
I do not work for any of these companies, just sharing my experience. I like to check BSI's info since they indicate whether EN ISO standards are identical to an ISO standard. The ANSI/AAMI/ISO or ANSI/AAMI/IEC standards also indicate their equivalency to the pure ISO/IEC standards.