I have checked this issue further it appears that eBay may be in the process of updating business account name which is invalidating saved searches for example fever kitsch is the name that appeared on my saved search listing, once I unsaved the seller search then resaved via an item listing. The account name reappeared as feverkitsch store_name fever kitsch  now all items appear.  If you usually have a lot if repeat sales from buyers, please be aware.