Items not showing under supplier codes

[dgf15215]

I have imported items as well as manually entered items that show up under the category headings but are not showing up under the supplier heading and I am trying to figure out why. If I go into the supplier heading it shows each supplier code and how many items are listed in each code but when I attempt to access them they aren't showing up. On the admin side the items show up as they should under the supplier code. Can anyone suggest what may have gone afoul here? Thnx.